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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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Lathe on the way
Hello all,
Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Bill |
#2
Posted to rec.crafts.metalworking
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Lathe on the way
Bill Schwab wrote:
Hello all, Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. You will be far happier with the D1-4. Back in 78 I took out a loan when I got to Japan to buy stereo equipment. The dollar was plunging vs the yen so even at the rates charged in that era, it worked out for me. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. Did you pay for lift gate service? If you are going to use the truck, I'd have looked into non lift gate service and picking it up at the terminal where they have a forklift. That is what I did for my Jet 20" bandsaw. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). The first thing is to have at least one friend that has moved things. Strapped to a pallet it likely isn't too tippy. Slings and a wrecker sounds good to me. I moved a 12x36 but it was on a low trailer. http://www.garage-machinist.com/usen...900_unload.jpg Digging holes for your back tires to lower the bed and using decent planking with the tailgate remove (assuming bumper works for this) might be an idea. Just take your time, be willing to tarp the lathe and call for help if it looks like it is getting out of control. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. http://wewilliams.net/SBLibrary.htm Look at his how to run a lathe pdfs. The basics haven't changed much. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. I doubt you have a big enough spindle bore to stick it through the head. You would also need a bushing to keep the far end of the stick from whipping. Lock the table, mill top edge of tubing, rotate 90, ect. I'd set the bit to cut flush with edge of the vise jaw. That way when you rotate your part 90, you can index to jaw edge. If the part doesn't stick up high enough to mill w/o hitting jaw, put something under stock. Good luck, Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#3
Posted to rec.crafts.metalworking
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Lathe on the way
On 2008-03-22, Bill Schwab wrote:
Hello all, Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. Congratulations! This should be a lot better than the belt driven one -- as long as you manage to avoid crashes. (Belts are more forgiving of crashes.) Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. O.K. I got my 12x24 Clausing from the flat-bed high truck which delivered it (pre-assembled to the pedestal) to my pickup truck by sliding it down a ramp made from five 10' 2x4s bolted edge on to three cross-boards on the bottom. I then drove it up the driveway, backed up to the garage, and slid it down the same ramp to the floor. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. I had no instructions (a used lathe, after all, but what I did was to jack up each end of the pallet and put cribbing under it -- first 2x4, then 4x4 then 2x4 on top of 4x4. Once I could do that, I could slide the legs under the long custom pallet to which the lathe was bolted. I removed the pallet, pulled it clear, and rotated the lathe so the headstock was towards the column of the engine hoist, and lowered it onto the floor. This allowed the legs to straddle it. If that orientation had not been possible, I would have lowered it onto cribbing again, removed the engine hoist, and using a rolling floor jack, removed 2" of cribbing height per cycle. Note that the 12x36" Jet which we got at work back around 1985 or so was brought in by professional riggers, but it was pre-assembled to its base, too. (The motor was in the base, IIRC, and lots of wiring in there, too. So it was brought in, the crate disassembled from around it, it was lifted clear of the pallet and that removed, too -- all by professionals. The real worry was that it (and the Bridgeport clone) were being mounted on a raised computer type lab floor. The trick was to put the load bads over the supported intersections of the floor panels where there was a jack column. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). You'll also prefer it to the Jacobs key type chuck, as long as you aren't using left-hand drill bits. I keep a Jacobs on an appropriate arbor for just that need. :-) Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? Hmm ... Either South Bend's or Atlas' _How to Run a Lathe_ will be good starters -- though they all assume belt driven lathes IIRC. But a lot of the principles are the same. And for more serious, go for Moultrecht's _Machine Shop Practice_, which covers all machine tools. It is in two volumes, and will tell you about things which you don't even know to ask about once the time comes to find out about them. I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I've not seen it, but I might expect it to be aimed for lighter machines. The "manual" with the lathe will give you details about the lathe, but not instructions on how to use it. BTW I would suggest that you retire the 4-station turret toolpost And instead get a BXA sized quick-change toolpost to put on there. If you've got the money, start with an Aloris starter set. Otherwise, go for a Phase-II set of the wedge style, not the piston style (more rigid and less chance of the locking arm swinging into the path of the chuck jaws). If you go Phase-II, remove the 8mm setscrews which hold the tools into the holders and replace them with ones from a box of US made ones (A box of 100 is quite cheap compared to the price you would pay at Home Despot on a per-each basis. The supplied setscrews are likely to split or round out and become very difficult to loosen unless the Chinese screws have improved in quality since I got mine. The rest of the toolpost and holders has been quite satisfactory. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. Hmm ... I think that your D1-4 won't hold 2" square tubing through the spindle, and that is way too much to stick out unsupported from the chuck -- even if you can open a 4-jaw far enough to let it seat on the spindle nose. I assume the trick would be to make/get a rest for square tubing??? Make a "spider". A round tube large enough to accept the diagonal of the workpiece, with set screws coming in from four sides to center it, and with a surface free of setscrews wide enough for the standard steady to hold. If you want to get fancy, mill a square hole in it, then grip from the inside with a 4-jaw chuck (figuring out how to center in in the process) and turn an OD to accept the steady fingers. Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Arrggghhh! You're going to stand it on end? How are you going to support the upper end? Same problem as you would have holding it in the lathe chuck. Too long for its cross-section. You'll try to compensate by cranking the milling vise tighter and probably crush the square tubing to rectangular or worse. Mount it sideways in the vise, mill one side of each (plus a little over half-way through the other two sides, then set up a stop on the table so you can mount each piece to line up with the previous cut when you do the final cut. Or -- if you have a horizontal mill, put a 5" milling cutter of perhaps 1/8" thickness or so in and cut through the whole end in one pass. (yes, those old horizontal spindle milling machines still have their uses. :-) Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#4
Posted to rec.crafts.metalworking
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Lathe on the way
On Fri, 21 Mar 2008 23:08:56 -0400, Bill Schwab
wrote: Hello all, ======================= Welcome to the wonderful world of machining! A word of advice -- before you power up your lathe, disassembly it as far as you dare, clean and relube. Asian machine tools are infamous for coming complete with foundry sand. I suggest using paint [*NOT* lacquer] thinner to clean with. This is "varsol." ======================= Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. Start with the cheap stuff first. one free source is http://www.niumotorsports.com/Learn/SAE/Lath.pdf Lindsay Books has reprints that are ideal for the home/hobby shop machinist. One of the first I suggest is by Milne from the mid to late 40s as this gives a good overview of the "total" manual machine shop. http://www.lindsaybks.com/bks/milne/index.html These following are all reprints of the 1940s-1950s manuals that came with the home/hobby shop lathes. (I am showing a number of sources, most are available at Lindsay] http://www.littlemachineshop.com/pro...ProductID=1594 http://www.lindsaybks.com/bks7/regal/index.html (check out the Lindsay and other sites for other books) ------------ The two volumes of Moltrecht will give you a more detailed overview of the manual machining process than Milne. http://www.normas.com/INDLPR/pages/11267.html http://www.normas.com/INDLPR/pages/11321.html ------------- Edwards will be very valuable as a continuing lathe reference https://www.hansergardner.com/dp/hgw...D340%2D9%20%20 ------------- Machinery's handbook is a basic reference. The older editions [eBay] are both cheaper and have material more suitable for the home/hoby ship machinist http://www.industrialpress.com/en/Ma...k/default.aspx ------------------ Browse http://mcduffee-associates.us/machin...ning_books.htm (and try to not spend all your money on books...) I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. ------------------------------ Magic solution is a 4 jaw chuck, a steady rest and a "cathead" An old fashioned but very useful tool. You will need a "bridge" made out of an old hacksaw blade to center the tube with your drop indicator. http://www.americanmachinetools.com/...se_a_lathe.htm [see cathead about 1/2 down page for picture -- you will more than likely have to make this tool from a short section of pipe and 8 screws.] No 4 jaw chuck? Use a face plate with an angle plate or piece of angle iron. ------- The older lathe books will have details on the bridge and pump staffs/wigglers. The work arounds and hints are one of the reasons the reprints are so valuable. Click on http://www.lindsaybks.com/bks2/tsotm/index.html for even more hints. ============== Bill Feel free to email me direct. Unka' George [George McDuffee] ------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end? Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625). |
#5
Posted to rec.crafts.metalworking
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Lathe on the way
On Mar 21, 11:08*pm, Bill Schwab wrote:
Hello all, ............. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. .... Could you lift one end at a time and put blocks under the pallet? My engine hoist has a small range of load and boom extension where the jack is strong enough but the center of gravity is near or forward of the wheels and the crane will either tip immediately or is unstable enough to tip when the load swings. Luckily I found this out by calculation when reconstructing the missing boom load chart. You can weigh the mast end and measure from there to the hook-end wheels to find how many foot-pounds of moment arm the hook will support without tipping. The problem of course is knowing the load's weight. If you lift the load an inch or two and then heave up on the mast you'll see if it's close to tipping. When I have to move something heavy I lower the load onto timbers placed across the engine hoist's base and roll it like a pallet jack. I've attached a trailer tongue jack to the upright mast and added extra wheels and a handle like on a pallet jack, which makes the hoist much easier to muscle around on dirt and lets me tow it with my tractor. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? *The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. * I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Bill If you set up an angle plate as a stop for the other end, you can turn the piece in the vise and mill each top edge. As long as the angle plate is square to the table it will stop the tubing at the same place each time regardless of where the high spot touches it. Jim Wilkins |
#6
Posted to rec.crafts.metalworking
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Lathe on the way
Wes,
You will be far happier with the D1-4. Back in 78 I took out a loan when I got to Japan to buy stereo equipment. The dollar was plunging vs the yen so even at the rates charged in that era, it worked out for me. In this case, I skimped up front, and I sure could do without a daily misery index report, but I fear that it will be a while before I would see yesterday's price on that lathe. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. Did you pay for lift gate service? If you are going to use the truck, I'd have looked into non lift gate service and picking it up at the terminal where they have a forklift. That is what I did for my Jet 20" bandsaw. I did pay for the gate, and it appeared on the invoice. The advantage of doing it this way is that I do not have the drive a long distance with the load. Slings and a wrecker sounds good to me. I moved a 12x36 but it was on a low trailer. http://www.garage-machinist.com/usen...900_unload.jpg That is something I need to try. To start, I would probably use a trailer as overkill on something I could do another way. So little time, so many cool ways to get into trouble On a more serious note, there is an equipment rental place not terribly far from my house. Digging holes for your back tires to lower the bed and using decent planking with the tailgate remove (assuming bumper works for this) might be an idea. I think the vertical dimensions add up in my favor. It seems unlikely that the lathe will ever be positioned where digging would be possible. If for some reason I have really botched the math to get into the truck, it's hello tarp and riggers. If I get into trouble with clearance inside the garage, then again, we wait for help. However, I am fairly certain that it will work, and there are "safe" stopping points along the way. I will also ensure that my car is not trapped, allowing me to run off to to hardware stores as needed. Just take your time, be willing to tarp the lathe and call for help if it looks like it is getting out of control. Already did In the sense that I talked to a guy I would call in such a situation. I arranged a couple of backup plans with him just in case. The lathe is not too much heavier than my mill, and I am better equipped and a bit more experienced than when I just barely got the mill where I wanted it. The real trick was getting up the 3/4 inch lip on the garage floor, but my truck will take care of that part, along with keeping the load from rolling down the hill. Perhaps naive, I figure that once I get the stand bolted to the lathe, I can move it fairly comfortably: just pick it up enough to slide over the floor and go slowly. It's the machine itself dangling feet off the ground that makes me nervous, but I will keep that to a minimum. The lathe will sit in the truck while I assemble the stand, etc. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. http://wewilliams.net/SBLibrary.htm Overhead belts - great stuff !!!!! Look at his how to run a lathe pdfs. The basics haven't changed much. Agreed. They look very much worth the time. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. I doubt you have a big enough spindle bore to stick it through the head. You would also need a bushing to keep the far end of the stick from whipping. I assumed as much. However, sticking through the bore might work for another material in my arsenal of stuff I use a lot: 3/4" square tubing, but that is easily side-milled. Lock the table, mill top edge of tubing, rotate 90, ect. I'd set the bit to cut flush with edge of the vise jaw. That way when you rotate your part 90, you can index to jaw edge. If the part doesn't stick up high enough to mill w/o hitting jaw, put something under stock. Interesting. Now you have me wondering whether I could clean up part of two edges and use a stop "below the cut" to index it. I prefer to position a stop and then locate it using a v-block or something, but it might work. "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller As an aside (and recognizing that it is a quote), we really have to stop calling them "officials." "Public servants" would a much better term to drill into them, and our peers. Bill |
#7
Posted to rec.crafts.metalworking
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Lathe on the way
"Bill Schwab" wrote in message ... Hello all, Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. The 12x gear head is a very capable lathe. Good bang for the buck. You should be pretty happy. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. That will work, but there is not much reason to get lift gate service if you are doing half the work. As another poster said, it is best to just go to the terminal and have the machine fork lifted into your truck. Avoids having to schedule and wait for delivery, too. A 2-ton engine hoist will handle the lathe very nicely. You can move the carriage around for balance, though I used a load balancer and two straps. The lathe did not tend to tip with the backsplash on, but wanted to tip without it. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. I cut away parts of the pallet and crate to get the hoist around mine. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). I like the Rohm keyless chucks. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. Definitely go through "Machine Shop Essentials" by Marlow. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. You can put the square tubing inside round tubing or pipe, secured and centered with screws, then hold the round in the chuck and steady. Have fun! Alan |
#8
Posted to rec.crafts.metalworking
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Lathe on the way
Don,
Congratulations! This should be a lot better than the belt driven one -- as long as you manage to avoid crashes. (Belts are more forgiving of crashes.) That part bothered me just a little, but it's not a good idea to crash things into machines anyway. It has a "fiber gear" to avoid total loses. They do not sell it online because they had problems with people buying the wrong one. Wanting to cash in on the extra 10% off for web orders, I figured I'd wait. However, I will get one to have on hand. O.K. I got my 12x24 Clausing from the flat-bed high truck which delivered it (pre-assembled to the pedestal) to my pickup truck by sliding it down a ramp made from five 10' 2x4s bolted edge on to three cross-boards on the bottom. I then drove it up the driveway, backed up to the garage, and slid it down the same ramp to the floor. I think I would call for help before trying that. I had no instructions (a used lathe, after all, but what I did was to jack up each end of the pallet and put cribbing under it -- first 2x4, then 4x4 then 2x4 on top of 4x4. Once I could do that, I could slide the legs under the long custom pallet to which the lathe was bolted. That makes sense, and I will probably end up doing that. Did you start out with a pry-bar to get it off the ground, or is there a slicker way? I removed the pallet, pulled it clear, and rotated the lathe so the headstock was towards the column of the engine hoist, and lowered it onto the floor. This allowed the legs to straddle it. Understood about the headstock next to the column of the hoist - that is what I plan to use to get the lathe onto the stand (I hopeg). It should work, assuming my mill is any example. If that orientation had not been possible, I would have lowered it onto cribbing again, removed the engine hoist, and using a rolling floor jack, removed 2" of cribbing height per cycle. I can largely picture that, but what is the goal? If you can't straddle the lathe with the legs, would not want to keep it on cribbing and/or just lift it to your truck? Or, are you simply giving instructions for getting back down in that case? Note that the 12x36" Jet which we got at work back around 1985 or so was brought in by professional riggers, but it was pre-assembled to its base, too. (The motor was in the base, IIRC, and lots of wiring in there, too. So it was brought in, the crate disassembled from around it, it was lifted clear of the pallet and that removed, too -- all by professionals. The real worry was that it (and the Bridgeport clone) were being mounted on a raised computer type lab floor. The trick was to put the load bads over the supported intersections of the floor panels where there was a jack column. Once the truck does its part, this will be on a garage floor. I am not sure I would want to try it on raised floor =:0 Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). You'll also prefer it to the Jacobs key type chuck, as long as you aren't using left-hand drill bits. I keep a Jacobs on an appropriate arbor for just that need. :-) I really enjoy my Jacobs chuck, and will probably end up buying another one to live on a 3MT arbor - later. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? [snip] Thanks! I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I've not seen it, but I might expect it to be aimed for lighter machines. True, but it still has been useful at times. The "manual" with the lathe will give you details about the lathe, but not instructions on how to use it. It is actually pretty good - one of the best I have seen on a Chinese machine. BTW I would suggest that you retire the 4-station turret toolpost And instead get a BXA sized quick-change toolpost to put on there. If you've got the money, start with an Aloris starter set. Otherwise, go for a Phase-II set of the wedge style, not the piston style (more rigid and less chance of the locking arm swinging into the path of the chuck jaws). If you go Phase-II, remove the 8mm setscrews which hold the tools into the holders and replace them with ones from a box of US made ones (A box of 100 is quite cheap compared to the price you would pay at Home Despot on a per-each basis. The supplied setscrews are likely to split or round out and become very difficult to loosen unless the Chinese screws have improved in quality since I got mine. The rest of the toolpost and holders has been quite satisfactory. I believe that to be excellent advice. It sounds very familiar from my earlier research on this purchase. Given what the IRS is going to do to me in a few weeks, it will have to wait. I almost didn't buy the lathe to be honest. I assume the trick would be to make/get a rest for square tubing??? Make a "spider". A round tube large enough to accept the diagonal of the workpiece, with set screws coming in from four sides to center it, and with a surface free of setscrews wide enough for the standard steady to hold. If you want to get fancy, mill a square hole in it, then grip from the inside with a 4-jaw chuck (figuring out how to center in in the process) and turn an OD to accept the steady fingers. Sounds like good practice. Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Arrggghhh! You're going to stand it on end? How are you going to support the upper end? Same problem as you would have holding it in the lathe chuck. Too long for its cross-section. You'll try to compensate by cranking the milling vise tighter and probably crush the square tubing to rectangular or worse. It worked very nicely once before. Making pairs of these things, I clamped the ends together and took light cuts. In fairness, those were a little shorter than the parts for the current job. Mount it sideways in the vise, mill one side of each (plus a little over half-way through the other two sides, then set up a stop on the table so you can mount each piece to line up with the previous cut when you do the final cut. To clarify, I would bring the stop into contact with the lower end of the first cut, tighten, and then move the part, right? My usual stops would probably trick me; they work nicely, but always seem to move a little when tightened - not a problem the way I use them. However, a v-block and a parallel or something held in place with clamps should do it. Or -- if you have a horizontal mill, put a 5" milling cutter of perhaps 1/8" thickness or so in and cut through the whole end in one pass. (yes, those old horizontal spindle milling machines still have their uses. :-) Not long ago I saw a picture of a Swedish(??) vertical/horizontal mill. Interesting looking thing. THANKS!! Bill |
#9
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Lathe on the way
On Sat, 22 Mar 2008 12:24:03 -0400, Bill Schwab wrote:
[Wes wrote] .... Just take your time, be willing to tarp the lathe and call for help if it looks like it is getting out of control. Already did In the sense that I talked to a guy I would call in such a situation. I arranged a couple of backup plans with him just in case. The lathe is not too much heavier than my mill, and I am better equipped and a bit more experienced than when I just barely got the mill where I wanted it. The real trick was getting up the 3/4 inch lip on the garage floor, but my truck will take care of that part, along with keeping the load from rolling down the hill. [...] If you have a pallet jack, it's fairly easy to go up a lip like that, as follows: Drop pallet, pull jack back say 4", then lift. Move the pallet forward until the front wheels hit the lip. Drop the pallet, push the jack up over the lip, raise the load, go forward until back wheel hits the lip, drop pallet, pull jack out, move jack to opposite side of pallet, etc. -jiw |
#10
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Lathe on the way
George,
I won't even try to put comments inline: there's too much great stuff in your reply to do it justice. I will check out the references. At first glance, the cathead is pretty much what I thought might be needed. AFAIK, the machine comes with 3- and 4-jaw chucks. You mention disassembly for cleaning, and you are not the first to mention casting sand. That is a scary thought for a splash-lubricated head stock! How far would you go? I recognize that you would probably be in a position to go farther than I should be willing to go, so perhaps I should ask what you would NOT touch??? With respect to moving the machine, what about the motor? Removing it might make it a little easier to handle, and if you want me to take it off for cleaning, perhaps I should get a head start?? Thanks! Bill |
#11
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Lathe on the way
Jim,
Could you lift one end at a time and put blocks under the pallet? My engine hoist has a small range of load and boom extension where the jack is strong enough but the center of gravity is near or forward of the wheels and the crane will either tip immediately or is unstable enough to tip when the load swings. Luckily I found this out by calculation when reconstructing the missing boom load chart. You can weigh the mast end and measure from there to the hook-end wheels to find how many foot-pounds of moment arm the hook will support without tipping. The problem of course is knowing the load's weight. If you lift the load an inch or two and then heave up on the mast you'll see if it's close to tipping. Don's reply got me thinking about that. IIRC, my hoist's boom will not over-extend, though if it starts to tip with the load on the ground, I'm not sure it's a big risk?? When I have to move something heavy I lower the load onto timbers placed across the engine hoist's base and roll it like a pallet jack. I have used the same trick. Once the base is attached and it comes time to slide it into place, I might prefer to keep it just off the ground; I look forward to being that far along. I've attached a trailer tongue jack to the upright mast and added extra wheels and a handle like on a pallet jack, which makes the hoist much easier to muscle around on dirt and lets me tow it with my tractor. My goal is to get nowhere near dirt on this move Thanks! Bill |
#12
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Lathe on the way
James,
If you have a pallet jack, it's fairly easy to go up a lip like that, as follows: Drop pallet, pull jack back say 4", then lift. Move the pallet forward until the front wheels hit the lip. Drop the pallet, push the jack up over the lip, raise the load, go forward until back wheel hits the lip, drop pallet, pull jack out, move jack to opposite side of pallet, etc. Interesting! I do not have one, but will probably get one eventually. For now, I _think_ I would rather hold out for a load positioner, especially with some storage options I have in mind. Of course, a pallet jack can handle a mill. Call me overly cautious, but if I end up with ton of mill in my garage, I want to be able to move it in an emergency. My favorite example scenario is a tree limb falls through the roof, and the mill needs to move either out of harm's way or to allow emergency repair access. In Florida, we think of such things. Bill |
#13
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Lathe on the way
Bill Schwab wrote:
Wes, Did you pay for lift gate service? If you are going to use the truck, I'd have looked into non lift gate service and picking it up at the terminal where they have a forklift. That is what I did for my Jet 20" bandsaw. I did pay for the gate, and it appeared on the invoice. The advantage of doing it this way is that I do not have the drive a long distance with the load. In my case the terminal was 7 miles a way. Took me most of an hour since I wasn't going fast with such a top heavy load. Road home had nice wide paved shoulders and I let everyone by. Slings and a wrecker sounds good to me. I moved a 12x36 but it was on a low trailer. http://www.garage-machinist.com/usen...900_unload.jpg That is something I need to try. To start, I would probably use a trailer as overkill on something I could do another way. So little time, so many cool ways to get into trouble On a more serious note, there is an equipment rental place not terribly far from my house. My little trailer has been great. Put a jack under the front end and I get to tip it to make unloading ez as pie. Bought the trailer when I went from pickup truck to car for gas mileage reasons. Uncle has a truck so we use his vehicle to move machines. Digging holes for your back tires to lower the bed and using decent planking with the tailgate remove (assuming bumper works for this) might be an idea. I think the vertical dimensions add up in my favor. It seems unlikely that the lathe will ever be positioned where digging would be possible. The idea is to drop your back tires of truck in the holes to get your bed closer to the ground. If for some reason I have really botched the math to get into the truck, it's hello tarp and riggers. If I get into trouble with clearance inside the garage, then again, we wait for help. However, I am fairly certain that it will work, and there are "safe" stopping points along the way. I will also ensure that my car is not trapped, allowing me to run off to to hardware stores as needed. Already did In the sense that I talked to a guy I would call in such a situation. I arranged a couple of backup plans with him just in case. The lathe is not too much heavier than my mill, and I am better equipped and a bit more experienced than when I just barely got the mill where I wanted it. The real trick was getting up the 3/4 inch lip on the garage floor, but my truck will take care of that part, along with keeping the load from rolling down the hill. When I unloaded my band saw, I took advantage of the lip on the approach to trap my planks between bumper and slab. You will be suprized on just how hard it is to get something to slide on rough wood. Perhaps naive, I figure that once I get the stand bolted to the lathe, I can move it fairly comfortably: just pick it up enough to slide over the floor and go slowly. It's the machine itself dangling feet off the ground that makes me nervous, but I will keep that to a minimum. The lathe will sit in the truck while I assemble the stand, etc. I'm not picturing that but as long as you are. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. http://wewilliams.net/SBLibrary.htm Overhead belts - great stuff !!!!! Well a few things have changed. Look at his how to run a lathe pdfs. The basics haven't changed much. Agreed. They look very much worth the time. "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller As an aside (and recognizing that it is a quote), we really have to stop calling them "officials." "Public servants" would a much better term to drill into them, and our peers. Yes, I agree but for some reason they seem to think we are their public servants. Maybe I ment serfs? Sure hope this all goes great for you. I figure a couple more weeks and I can get back out into the garage w/o freezing my arse off. Post pictures of the unload. Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#14
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Lathe on the way
Bill Schwab wrote:
Interesting! I do not have one, but will probably get one eventually. For now, I _think_ I would rather hold out for a load positioner, especially with some storage options I have in mind. Of course, a pallet jack can handle a mill. Call me overly cautious, but if I end up with ton of mill in my garage, I want to be able to move it in an emergency. My favorite example scenario is a tree limb falls through the roof, and the mill needs to move either out of harm's way or to allow emergency repair access. In Florida, we think of such things. I assume you keep a supply of "blue roofing" on hand Three pieces of 3/4" pipe wide enough to span the base of a bridgeport and a prybar or two is enough to move a bridgeport on your own. Always better if you have a friend to help but doable on your own. I lust after a lift table/cart. Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#15
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Lathe on the way
Alan,
That will work, but there is not much reason to get lift gate service if you are doing half the work. As another poster said, it is best to just go to the terminal and have the machine fork lifted into your truck. Avoids having to schedule and wait for delivery, too. Understood, but this means I can crawl up and down the driveway vs. fighting traffic. Maybe next time. A 2-ton engine hoist will handle the lathe very nicely. You can move the carriage around for balance, Nice! I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. I cut away parts of the pallet and crate to get the hoist around mine. I think I will end up using cribbing (good excuse to practice), unless it is near an edge - my mill was when it arrived, but I suspect the lathe will likely be centered, or nearly so because there is not much else in the shipment this time. Have fun! Will do! Bill |
#16
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Lathe on the way
On Fri, 21 Mar 2008 23:08:56 -0400, Bill Schwab
wrote: snip I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. snip ============ One dodge is to use your lathe as a horizontal mill. fabricate a block to hold a HSS lathe tool to the face plate. This is your fly cutter. Remove the compound and rig up a way to hold the square tube on the cross slide. Use the cross slide to move the tube in and out past the fly cutter. An angle iron with a spacer underneath should be adequate loction. May be a little "fiddly" to set up, but cheap. Unka' George [George McDuffee] ------------------------------------------- He that will not apply new remedies, must expect new evils: for Time is the greatest innovator: and if Time, of course, alter things to the worse, and wisdom and counsel shall not alter them to the better, what shall be the end? Francis Bacon (1561-1626), English philosopher, essayist, statesman. Essays, "Of Innovations" (1597-1625). |
#17
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Lathe on the way
George,
On Fri, 21 Mar 2008 23:08:56 -0400, Bill Schwab wrote: snip I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. snip ============ One dodge is to use your lathe as a horizontal mill. fabricate a block to hold a HSS lathe tool to the face plate. This is your fly cutter. Remove the compound and rig up a way to hold the square tube on the cross slide. Use the cross slide to move the tube in and out past the fly cutter. An angle iron with a spacer underneath should be adequate loction. May be a little "fiddly" to set up, but cheap. I plan try some things like that. One of the reasons I wanted to skip the threaded spindle machine is that I realized I would want to do a fair number of interrupted cuts. My mill-drill serves me well, but facing plates can be a pain - I have to really stay on top of the vertical feed (the lock is not enough) to get good results. There isn't much else that it does or fails to do that bothers me. I realize I will almost certainly end up buying a bigger mill some day, but see no need to rush into it. So far, I suspect I might want a baby bridgie with a riser block, but I have yet to find that Whether or not dumping my facing work on the lathe is a good idea, it will be a good addition to my shop, and it is past time for me to learn my way around one. My hope is that this will be my "second" lathe, meaning I hopefully skipped the starter machine and got something that will meet my long-term needs for a lathe. Bill |
#18
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Lathe on the way
On 2008-03-22, Wes wrote:
My little trailer has been great. Put a jack under the front end and I get to tip it to make unloading ez as pie. Bought the trailer when I went from pickup truck to car for gas mileage reasons. Uncle has a truck so we use his vehicle to move machines. What I do to tip my trailer, is I keep it hitched to the truck and drive the rear wheels of my truck on a ramp (or just 2x10s). i |
#19
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Lathe on the way
Wes,
I assume you keep a supply of "blue roofing" on hand Almost I *do* have plywood and pitch, and a fair amount of plastic. I try to strike a balance between paranoia and common sense, leaning toward the latter. If the roof comes off the house, I have big problem. If a tree limb strikes, I might be able to keep it down to a small problem with some reasonable preparation. Three pieces of 3/4" pipe wide enough to span the base of a bridgeport and a prybar or two is enough to move a bridgeport on your own. Always better if you have a friend to help but doable on your own. I have heard that enough times that I am starting to believe it. However, I would like to have a slight technological edge on the damn thing. Let's see how I do with the lathe. I lust after a lift table/cart. I almost bought something a while back, but it wasn't quite right. I will allow myself one or two such items, but between money and storage space, I want to plan ahead. Bill |
#20
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Lathe on the way
On Sat, 22 Mar 2008 15:26:43 -0400, Bill Schwab
wrote: I assume you keep a supply of "blue roofing" on hand Almost I *do* have plywood and pitch, and a fair amount of plastic. I try to strike a balance between paranoia and common sense, leaning toward the latter. If the roof comes off the house, I have big problem. If a tree limb strikes, I might be able to keep it down to a small problem with some reasonable preparation. Three pieces of 3/4" pipe wide enough to span the base of a bridgeport and a prybar or two is enough to move a bridgeport on your own. Always better if you have a friend to help but doable on your own. I have heard that enough times that I am starting to believe it. However, I would like to have a slight technological edge on the damn thing. Let's see how I do with the lathe. I lust after a lift table/cart. I almost bought something a while back, but it wasn't quite right. I will allow myself one or two such items, but between money and storage space, I want to plan ahead. Air bearings should do it. ;-) A 4' x 4' sheet of 1/2" plate steel underneath the mill, with a 3/8" NPT threaded hole in the center. Screw in a QD spud and apply 90 PSI air pressure, and suddenly it's floating... Only works on a flat or near-flat slab, but that's the classical definition of a garage. -- Bruce -- |
#21
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Lathe on the way
On Sat, 22 Mar 2008 05:51:03 -0700 (PDT), Jim Wilkins
wrote: My engine hoist has a small range of load and boom extension where the jack is strong enough but the center of gravity is near or forward of the wheels and the crane will either tip immediately or is unstable enough to tip when the load swings. Luckily I found this out by calculation when reconstructing the missing boom load chart. You can weigh the mast end and measure from there to the hook-end wheels to find how many foot-pounds of moment arm the hook will support without tipping. The problem of course is knowing the load's weight. If you lift the load an inch or two and then heave up on the mast you'll see if it's close to tipping. Ahem. Counterbalance on the ram end of the engine hoist? I plan to cut a small chunk of plywood into a platform to fit over the legs of mine at that end, and then stack bricks or concrete blocks, two 5-gallon buckets full of sand, or other 'found weight' as needed to achieve stability. If you have barbell weights, all it would take is a chunk of pipe to slide them onto, big mouse clip and a flatwasher to keep them there. -- Bruce -- |
#22
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Lathe on the way
On Mar 22, 4:48*pm, Bruce L. Bergman
wrote: On Sat, 22 Mar 2008 05:51:03 -0700 (PDT), Jim Wilkins ...and the crane will either tip immediately or is unstable enough to tip when the load swings. ... * Ahem. *Counterbalance on the ram end of the engine hoist? ... * -- Bruce -- The original load chart may have considered tipping, but I only had the max load with the boom fully in to work backwards from. The best counterweight would be the tractor if I can figure out a way to mount a fixed hitch coupler that doesn't interfere with the trailer jack and its swivel handle. Otherwise it's only a problem when I help the neighbors unload a welder or such off a truck (my stuff isn't that heavy) and several of the guys can just stand on it rather than watching, drinking beer and wisecracking. ----------------------------------------------------------- Thanks for getting me thinking. A rope from the mast top to the trailer hitch coupler that's already on the handle end will be enough to keep the hoist from tipping and it won't interfere with manhandling the hoist into position. That fixed coupler would still be useful to allow the tractor to back it up without jackknifing. Jim Wilkins |
#23
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Lathe on the way
Bill,
I can tell you that about 1 year ago my younger brother took delivery of the same lathe (12 x 26 gap bed) from HF at their store about 20 miles away. He got it on a Friday night and after work, he and I took it off of his truck by hand... We did it by taking it apart. The motor, the ways, the head stock, etc. It was still very heavy, but us two 40 year old lads did it, but it was heavy. What followed next was a full on disassembly of all parts of that machine. Every part was taken apart, cleaned a polished. It took about 4 weekends worth of work. We used solvents etc. It was surprising, to say the least, how much grit was in the machine, the head stock being the worst. All told, we measured just under 3/4's of a cup of grit. What we did was to filter all the solvents and old oils etc and collect the grit.... My guess is that the lathe would not have run for a month, if we had left all of that crud in and on the machine. We also were able to correct a couple of gears that were not aligned so great. A year latter, with a fair amount of use now, the lathe is still running strong and the original tolerances are holding just fine. I would consider this lathe to be more of a lathe kit, then a finished product, ready to run!!!! But once its all cleaned up and put back together, WOW is it nice. Never crashed a tool, never had an issue of any type. All told a great lathe. bob "Bill Schwab" wrote in message ... George, I won't even try to put comments inline: there's too much great stuff in your reply to do it justice. I will check out the references. At first glance, the cathead is pretty much what I thought might be needed. AFAIK, the machine comes with 3- and 4-jaw chucks. You mention disassembly for cleaning, and you are not the first to mention casting sand. That is a scary thought for a splash-lubricated head stock! How far would you go? I recognize that you would probably be in a position to go farther than I should be willing to go, so perhaps I should ask what you would NOT touch??? With respect to moving the machine, what about the motor? Removing it might make it a little easier to handle, and if you want me to take it off for cleaning, perhaps I should get a head start?? Thanks! Bill |
#24
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Lathe on the way
On 2008-03-22, Bill Schwab wrote:
Don, Congratulations! This should be a lot better than the belt driven one -- as long as you manage to avoid crashes. (Belts are more forgiving of crashes.) That part bothered me just a little, but it's not a good idea to crash things into machines anyway. It has a "fiber gear" to avoid total loses. Good! They do not sell it online because they had problems with people buying the wrong one. Wanting to cash in on the extra 10% off for web orders, I figured I'd wait. However, I will get one to have on hand. If you have a spare on hand, you are less likely to need it. :-) O.K. I got my 12x24 Clausing from the flat-bed high truck which delivered it (pre-assembled to the pedestal) to my pickup truck by sliding it down a ramp made from five 10' 2x4s bolted edge on to three cross-boards on the bottom. I then drove it up the driveway, backed up to the garage, and slid it down the same ramp to the floor. I think I would call for help before trying that. I had help from the driver sliding it into the pickup (3/4 ton, 4WD), and help from a friend an my wife when sliding it down the ramp into the garage. The friend helped me pull it, and my wife "tailed" on a line looped several times through a carabiner clip so she did not need much pull to control the motion of the lathe down the ramp. I had no instructions (a used lathe, after all, but what I did was to jack up each end of the pallet and put cribbing under it -- first 2x4, then 4x4 then 2x4 on top of 4x4. Once I could do that, I could slide the legs under the long custom pallet to which the lathe was bolted. That makes sense, and I will probably end up doing that. Did you start out with a pry-bar to get it off the ground, or is there a slicker way? A pry-bar plus a length of 2x4 acting as a longer pry-bar. But it was easier to get hooked into the upper layer of the pallet for the first motion. I would have used the engine hoist from the start for unloading from the pickup -- except that I had to unload the pickup to drive over to a friend's place to borrow the engine hoist. I've since acquired my own. :-) I removed the pallet, pulled it clear, and rotated the lathe so the headstock was towards the column of the engine hoist, and lowered it onto the floor. This allowed the legs to straddle it. Understood about the headstock next to the column of the hoist - that is what I plan to use to get the lathe onto the stand (I hopeg). It should work, assuming my mill is any example. Good. If that orientation had not been possible, I would have lowered it onto cribbing again, removed the engine hoist, and using a rolling floor jack, removed 2" of cribbing height per cycle. I can largely picture that, but what is the goal? If you can't straddle the lathe with the legs, would not want to keep it on cribbing and/or just lift it to your truck? Or, are you simply giving instructions for getting back down in that case? It had to be lifted to unbolt the pallet. Once it was in the air, the choices were to lower it onto the legs of the hoist (counter productive) or onto cribbing so the hoist could be removed. Note that the 12x36" Jet which we got at work back around 1985 or so was brought in by professional riggers, but it was pre-assembled to its base, too. (The motor was in the base, IIRC, and lots of wiring in there, too. So it was brought in, the crate disassembled from around it, it was lifted clear of the pallet and that removed, too -- all by professionals. The real worry was that it (and the Bridgeport clone) were being mounted on a raised computer type lab floor. The trick was to put the load bads over the supported intersections of the floor panels where there was a jack column. Once the truck does its part, this will be on a garage floor. I am not sure I would want to try it on raised floor =:0 We had no choice -- since the work needed to remove not only that room's raised floor, but the one before it through which it came would have been a major problem -- especially with the conduit and plumbing below the floor. At least there was a nice long ramp before the first room which would serve as the first test of whether it would support what was being moved. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). You'll also prefer it to the Jacobs key type chuck, as long as you aren't using left-hand drill bits. I keep a Jacobs on an appropriate arbor for just that need. :-) I really enjoy my Jacobs chuck, and will probably end up buying another one to live on a 3MT arbor - later. Wait until you've done a few projects with the Rohm keyless chuck. (I do presume that the Rohm is keyless and the Jacobs is keyed, though both make both styles. And I have a nice Jacobs keyless on my drill press (which came with a 5/8" or 3/4" clone of a Jacobs chuck -- always too big for metalworking with the slowest speed available from the spindle. :-) Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? [snip] Thanks! I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I've not seen it, but I might expect it to be aimed for lighter machines. True, but it still has been useful at times. For that matter, I learned a lot from the manual for my Unimat SL-1000, including tricks which I have not seen documented in manuals for larger machines. :-) The "manual" with the lathe will give you details about the lathe, but not instructions on how to use it. It is actually pretty good - one of the best I have seen on a Chinese machine. Hmm ... a significant improvement from one for the Jet from around 1980-85. BTW I would suggest that you retire the 4-station turret toolpost And instead get a BXA sized quick-change toolpost to put on there. If you've got the money, start with an Aloris starter set. Otherwise, go for a Phase-II set of the wedge style, not the piston style (more rigid and less chance of the locking arm swinging into the path of the chuck jaws). If you go Phase-II, remove the 8mm setscrews which hold the tools into the holders and replace them with ones from a box of US made ones (A box of 100 is quite cheap compared to the price you would pay at Home Despot on a per-each basis. The supplied setscrews are likely to split or round out and become very difficult to loosen unless the Chinese screws have improved in quality since I got mine. The rest of the toolpost and holders has been quite satisfactory. I believe that to be excellent advice. It sounds very familiar from my earlier research on this purchase. Given what the IRS is going to do to me in a few weeks, it will have to wait. I almost didn't buy the lathe to be honest. O.K. So keep your eyes open for sales for the Phase-II wedge style set. I got mine from such a sale -- choosing to pay more for the wedge style over the piston style. [ ... ] Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Arrggghhh! You're going to stand it on end? How are you going to support the upper end? Same problem as you would have holding it in the lathe chuck. Too long for its cross-section. You'll try to compensate by cranking the milling vise tighter and probably crush the square tubing to rectangular or worse. It worked very nicely once before. Making pairs of these things, I clamped the ends together and took light cuts. In fairness, those were a little shorter than the parts for the current job. If you had two side by side, and firmly clamped that way, it would be a lot better than one at a time. Mount it sideways in the vise, mill one side of each (plus a little over half-way through the other two sides, then set up a stop on the table so you can mount each piece to line up with the previous cut when you do the final cut. To clarify, I would bring the stop into contact with the lower end of the first cut, tighten, and then move the part, right? My usual stops would probably trick me; they work nicely, but always seem to move a little when tightened - not a problem the way I use them. However, a v-block and a parallel or something held in place with clamps should do it. I would just make a cut through a bit over half of the height of each one not worrying about the end stop then. Then rotate one piece 90 degrees, so there is both a top and a bottom section machined together. Set the stop to press on a bottom section of the machined area, lock it, and then move the X-axis to bring the edge of the end mill just barely contact with the end. IIRC, cigarette rolling papers are supposed to be good for this -- moisten one, and stick it on the end of the machined surface, and bring the X-axis in until the endmill just whisks the paper away -- you are then within 0.001". Now -- lock the X-axis, stop the spindle, crank the Y-axis clear in such a direction so you will be doing conventional milling not climb milling when you bring the mill back into contact, loosen the vise, and rotate the workpiece so the long un-milled part is on top and the long machined part is on the bottom in contact with the work stop. Tighten the vise, mill through the un-machined work (with a little overlap), loosen the vise, crank the Y-axis back to where it was before, and clamp the next half-done workpiece against the stop. Repeat until all are done on that end. Then carefully cut to final length on one side of the other end of all parts (perhaps setting the stop at the already milled in now if all are to be the same length), and machine each one top flip bottom and on to the next. Or -- if you have a horizontal mill, put a 5" milling cutter of perhaps 1/8" thickness or so in and cut through the whole end in one pass. (yes, those old horizontal spindle milling machines still have their uses. :-) Not long ago I saw a picture of a Swedish(??) vertical/horizontal mill. Interesting looking thing. Yes -- those are nice machines, and I wish that I had one, and sufficient electric power to run one properly. THANKS!! You're welcome. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#25
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Lathe on the way
On 2008-03-22, Bill Schwab wrote:
George, [ ... ] You mention disassembly for cleaning, and you are not the first to mention casting sand. That is a scary thought for a splash-lubricated head stock! How far would you go? I recognize that you would probably be in a position to go farther than I should be willing to go, so perhaps I should ask what you would NOT touch??? From what I have read, the gear-head machines have been made with more attention to such matters than the belt-driven ones from the same source -- and the larger lathes better made than the smaller ones. All that extra money pays for more than just more cast iron. :-) I would suggest taking apart and checking the compound and the cross slide. If those are well done, you probably have pretty good chances with the rest. Maybe take apart and check the tailstock as well. Taking apart the gear-head headstock to sufficient level of detail is a major undertaking. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#26
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Lathe on the way
Bob,
I can tell you that about 1 year ago my younger brother took delivery of the same lathe (12 x 26 gap bed) from HF at their store about 20 miles away. He got it on a Friday night and after work, he and I took it off of his truck by hand... We did it by taking it apart. The motor, the ways, the head stock, etc. It was still very heavy, but us two 40 year old lads did it, but it was heavy. What followed next was a full on disassembly of all parts of that machine. [snip] Are you two the types who rebuild Jaguar engines for fun? I'm at the replace the water pump level. Any special tools required? It looks like I would want to finally get a pair of c-clip pliers. Otherwise I'm guessing it's the usual stuff any good tool freak will have on hand. Did you find any torque specs? Do you have any photos of the re-assembly? Thanks, Bill |
#27
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Lathe on the way
Don,
They do not sell it online because they had problems with people buying the wrong one. Wanting to cash in on the extra 10% off for web orders, I figured I'd wait. However, I will get one to have on hand. If you have a spare on hand, you are less likely to need it. :-) My thinking exactly, sir! O.K. I got my 12x24 Clausing from the flat-bed high truck which delivered it (pre-assembled to the pedestal) to my pickup truck by sliding it down a ramp made from five 10' 2x4s bolted edge on to three cross-boards on the bottom. I then drove it up the driveway, backed up to the garage, and slid it down the same ramp to the floor. I think I would call for help before trying that. I had help from the driver sliding it into the pickup (3/4 ton, 4WD), and help from a friend an my wife when sliding it down the ramp into the garage. The friend helped me pull it, and my wife "tailed" on a line looped several times through a carabiner clip so she did not need much pull to control the motion of the lathe down the ramp. I thought about a truck/truck transfer, but will probably go the ground and hoist route. I had no instructions (a used lathe, after all, but what I did was to jack up each end of the pallet and put cribbing under it -- first 2x4, then 4x4 then 2x4 on top of 4x4. Once I could do that, I could slide the legs under the long custom pallet to which the lathe was bolted. That makes sense, and I will probably end up doing that. Did you start out with a pry-bar to get it off the ground, or is there a slicker way? A pry-bar plus a length of 2x4 acting as a longer pry-bar. But it was easier to get hooked into the upper layer of the pallet for the first motion. Dumb question: any trick to keeping the pull from simply tearing apart the pallet? One thought I had was a 2x4 shoved in the pallet and a sling over it up to the hoist - that should get it going, assuming the wood can take it. I would have used the engine hoist from the start for unloading from the pickup -- Good to know. At the risk of appearing to cross-examine (in reality I simply want to understand to get the most out of your helpful descriptions), unload from the _pickup_??? Would you still have done the ramp transfer, or would you have gone flatbed-ground-hoist? except that I had to unload the pickup to drive over to a friend's place to borrow the engine hoist. I've since acquired my own. :-) Ok, now I'm starting to think that you would have done the ramp between the two trucks, and then used to hoist from your pickup to the ground. Is that it? If that orientation had not been possible, I would have lowered it onto cribbing again, removed the engine hoist, and using a rolling floor jack, removed 2" of cribbing height per cycle. I can largely picture that, but what is the goal? If you can't straddle the lathe with the legs, would not want to keep it on cribbing and/or just lift it to your truck? Or, are you simply giving instructions for getting back down in that case? It had to be lifted to unbolt the pallet. Once it was in the air, the choices were to lower it onto the legs of the hoist (counter productive) or onto cribbing so the hoist could be removed. I still do not quite follow (sorry). Unless the idea was to lower onto cribbing to have stable foundation while you unbolted the pallet? I am assuming that you slung the lathe, and the pallet is just along for the ride; one could then unbolt with the whole thing swinging, but it would be very dangerous to do that - the load could fall, or shift and then fall as the pallet does weirdness being partially attached to that lathe. However, I would probably leave the hoist holding some tension on the lathe, just in case all hell broke loose with the pallet while I was unbolting it. We had no choice -- since the work needed to remove not only that room's raised floor, but the one before it through which it came would have been a major problem -- especially with the conduit and plumbing below the floor. At least there was a nice long ramp before the first room which would serve as the first test of whether it would support what was being moved. Scary thought, but I get the idea. I really enjoy my Jacobs chuck, and will probably end up buying another one to live on a 3MT arbor - later. Wait until you've done a few projects with the Rohm keyless chuck. (I do presume that the Rohm is keyless and the Jacobs is keyed, though both make both styles. And I have a nice Jacobs keyless on my drill press (which came with a 5/8" or 3/4" clone of a Jacobs chuck -- always too big for metalworking with the slowest speed available from the spindle. :-) Please be careful, as my evil twin is the one who buys all this stuff; I am fairly certain he settled for a keyed chuck Humor aside, I might be in for a pleasant surprise, but I was trying to balance price and quality, and the Enco tech suggested the Rohm as a worthy compromise. Worst case, it will become a backup to my Jacobs. Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? [snip] Thanks! I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I've not seen it, but I might expect it to be aimed for lighter machines. True, but it still has been useful at times. For that matter, I learned a lot from the manual for my Unimat SL-1000, including tricks which I have not seen documented in manuals for larger machines. :-) The "manual" with the lathe will give you details about the lathe, but not instructions on how to use it. It is actually pretty good - one of the best I have seen on a Chinese machine. Hmm ... a significant improvement from one for the Jet from around 1980-85. I bought my last Jet machine a couple of years ago. The clincher was when I called them to point out that they had an safety latch that needed to remain in place bolted at one point, and that it would eventually pivot. Nutty me, I thought they would want to know - they didn't care, nor did they seem to even grasp how stupid the design might be, nor that they might want to find somebody who might understand same. Anyway, it *did* fail as I predicted. BTW I would suggest that you retire the 4-station turret toolpost And instead get a BXA sized quick-change toolpost to put on there. If you've got the money, start with an Aloris starter set. Otherwise, go for a Phase-II set of the wedge style, not the piston style (more rigid and less chance of the locking arm swinging into the path of the chuck jaws). If you go Phase-II, remove the 8mm setscrews which hold the tools into the holders and replace them with ones from a box of US made ones (A box of 100 is quite cheap compared to the price you would pay at Home Despot on a per-each basis. The supplied setscrews are likely to split or round out and become very difficult to loosen unless the Chinese screws have improved in quality since I got mine. The rest of the toolpost and holders has been quite satisfactory. I believe that to be excellent advice. It sounds very familiar from my earlier research on this purchase. Given what the IRS is going to do to me in a few weeks, it will have to wait. I almost didn't buy the lathe to be honest. O.K. So keep your eyes open for sales for the Phase-II wedge style set. I got mine from such a sale -- choosing to pay more for the wedge style over the piston style. Great minds... I fully expect to go that route, I just have to slow down the flow of green stuff out of my wallet for a while. If the Phase-II is anything like the RT they make, it will be very much worth the money. I assume/hope that I will be able to function with the existing post while I fumble my way along with learning what the new toy can do. After I recover from April 15 and brace for the local guys mugging me later in the year, I can start looking for sales. [ ... ] Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Arrggghhh! You're going to stand it on end? How are you going to support the upper end? Same problem as you would have holding it in the lathe chuck. Too long for its cross-section. You'll try to compensate by cranking the milling vise tighter and probably crush the square tubing to rectangular or worse. It worked very nicely once before. Making pairs of these things, I clamped the ends together and took light cuts. In fairness, those were a little shorter than the parts for the current job. If you had two side by side, and firmly clamped that way, it would be a lot better than one at a time. That is what I did. One of the parts is a singleton, but I would no doubt give it a shorter peer to help stabilize it. The other reason to cut two at a time was that I wanted them to be the same length, whatever that turned out to be. Now that I think about it, if I put that improvised stop in the center, it should be able to work for both tubes, allowing me to the lengths the same - I think Mount it sideways in the vise, mill one side of each (plus a little over half-way through the other two sides, then set up a stop on the table so you can mount each piece to line up with the previous cut when you do the final cut. To clarify, I would bring the stop into contact with the lower end of the first cut, tighten, and then move the part, right? My usual stops would probably trick me; they work nicely, but always seem to move a little when tightened - not a problem the way I use them. However, a v-block and a parallel or something held in place with clamps should do it. I would just make a cut through a bit over half of the height of each one not worrying about the end stop then. Then rotate one piece 90 degrees, so there is both a top and a bottom section machined together. Set the stop to press on a bottom section of the machined area, lock it, and then move the X-axis to bring the edge of the end mill just barely contact with the end. IIRC, cigarette rolling papers are supposed to be good for this -- moisten one, and stick it on the end of the machined surface, and bring the X-axis in until the endmill just whisks the paper away -- you are then within 0.001". Now -- lock the X-axis, stop the spindle, crank the Y-axis clear in such a direction so you will be doing conventional milling not climb milling when you bring the mill back into contact, loosen the vise, and rotate the workpiece so the long un-milled part is on top and the long machined part is on the bottom in contact with the work stop. Tighten the vise, mill through the un-machined work (with a little overlap), loosen the vise, crank the Y-axis back to where it was before, and clamp the next half-done workpiece against the stop. Repeat until all are done on that end. Then carefully cut to final length on one side of the other end of all parts (perhaps setting the stop at the already milled in now if all are to be the same length), and machine each one top flip bottom and on to the next. Dumb question: after the first cut puts the machined surface right at the edge of the tool, right? Would not a stop set against it (firm but not deformed) be in just the right place w/o moving the table? I need to read it a few more times, but you appear to have added a step. What does that fix? Thanks! Bill |
#28
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Lathe on the way
Don,
From what I have read, the gear-head machines have been made with more attention to such matters than the belt-driven ones from the same source -- and the larger lathes better made than the smaller ones. All that extra money pays for more than just more cast iron. :-) FWIW, I have gotten to know one of the Enco techs, and he seems to think the lathe I bought is a good one. I will ask him about this, but suspect he will agree with you. I would suggest taking apart and checking the compound and the cross slide. If those are well done, you probably have pretty good chances with the rest. Maybe take apart and check the tailstock as well. That seems reasonable. Taking apart the gear-head headstock to sufficient level of detail is a major undertaking. I feared as much. Is there a good compromise: open a panel and look for signs of trouble? Bill |
#29
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Lathe on the way
No, we don't have a jag.... Chevy and Pontiac here.... Yea, we do go a
little deep sometimes, but this thing wasn't that bad. Not like an engine rebuild or anything. My brother did take lots of pictures and if your really interested, I can get him to load them on his ftp site. no real special tools, a bench buffer was used to really clean out the gears and get the edge burrs off. Torque was not really a concern as some of the nuts and bolts were only finger tight... we just watched what we were doing and tried to use common sense. we did use lots of lube (I don't remember what it was, but he does I am sure) and changed the head oil a couple of times, in short order after a self described break in period. This lathe has a sight glass for oil level and since we got the insides really clean the glass has stayed clean a readable. The oil color has not changed at all. Like I said before, this is a great lathe!!! but consider it a lathe kit as it comes from the factory!!!!!!!! bob "Bill Schwab" wrote in message ... Bob, I can tell you that about 1 year ago my younger brother took delivery of the same lathe (12 x 26 gap bed) from HF at their store about 20 miles away. He got it on a Friday night and after work, he and I took it off of his truck by hand... We did it by taking it apart. The motor, the ways, the head stock, etc. It was still very heavy, but us two 40 year old lads did it, but it was heavy. What followed next was a full on disassembly of all parts of that machine. [snip] Are you two the types who rebuild Jaguar engines for fun? I'm at the replace the water pump level. Any special tools required? It looks like I would want to finally get a pair of c-clip pliers. Otherwise I'm guessing it's the usual stuff any good tool freak will have on hand. Did you find any torque specs? Do you have any photos of the re-assembly? Thanks, Bill |
#30
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Lathe on the way
Bob,
No, we don't have a jag.... Chevy and Pontiac here.... Yea, we do go a little deep sometimes, I knew it My beat up '96 F-150 that I bought a couple of years ago is less beat up than it was - mostly by my hand, so I can no longer claim to be a complete wimp. But as Dirty Harry said "A man's got to know his limitations." My brother did take lots of pictures and if your really interested, I can get him to load them on his ftp site. Whether or not I decide to tear it down, I would greatly enjoy seeing the pictures, and I am probably not alone. no real special tools, a bench buffer was used to really clean out the gears and get the edge burrs off. That's probably just a new wheel for my grinder. From the diagrams, I'd blow for a proper c-clip tool. we did use lots of lube (I don't remember what it was, but he does I am sure) That would be good to know. I am aware that people slather engine parts with assembly lube - I have yet to get that far into one. and changed the head oil a couple of times, in short order after a self described break in period. The manual refers to one too - a certain number of hours below a specified speed. Thanks! Bill |
#31
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Lathe on the way
On Fri, 21 Mar 2008 22:08:56 -0500, Bill Schwab
wrote: Hello all, Overlapping sales and the likelihood of more weakening of the dollar pushed me over the edge on the Enco 12x36 geared head lathe; the spindle is D1-4. You might recall that I got pretty close to buying the belt-driven threaded-spindle version of the machine back in the fall. Long story short: I just couldn't go through with it, and ended up getting a better machine for the same (perhaps less) money than I would have paid for the lesser one in the fall. Presumably in a matter of days, a lift-gated truck will appear at my curb. I am planning to use an engine hoist to lift the lathe (the manual has pictures of how to sling it), back my F-150 under it, drive the 50ft to the garage (it's the down-hill part that makes it fun w/o a truck), back in enough to reach level cement, and then again use the hoist to exchange truck bed for assembled stand. Sound about right? It weighs around 1000 lb. I am a little concerned about getting the hoist to straddle the pallet; suggestions, lessons from the school of hard knocks, etc., would be appreciated. Enco tells me it holds 3 gallons of hydraulic fluid!!! That's on the way too. I ended up buying a a Rohm ball bearing chuck and an arbor. It was a LOT cheaper than the Jacobs chuck that I might eventually get (and have on an R8 arbor for my mill). Assuming I know nothing about running a lathe (not far from the truth), any good reading assignments? I have a couple of Audel books, but I find them to be short on teaching: great references though. The Home Machinist's Handbook by Brinney looks helpful. I will probably end up doing this on my mill, but is there a good way to face the ends of square tubing on a lathe? The pieces I have in mind are 2" square, 1/8" wall thickness, and vary from 11 to 14 inches or so. I assume the trick would be to make/get a rest for square tubing??? Beyond an opportunity to fiddle with the new toy, the cross-section is too deep to easily side mill (should have thought to buy long end-mills while I was at it), but with an R8 collet (to save vertical space) and some cranking, my mill should do the job with a fly cutter. Bill For me the scariest part of the job is getting the heavy stuff off the truck on to the ground. I ended up renting a forklift for that. If they can put it on the ground for you, I'd consider that half the battle. I don't know how steep your driveway is or if it is paved. I'd arrange to put 1x6 as runners on the bottom of the pallet, then put it all on pipes. Alternately use strong casters. I'd tie the lathe to the truck to keep it from rolling downhill. Then having one person on each side of the lathe, back the truck up slowly, and move the pipes as they come out to the other side. Once in the garage, move it wherever you want. After that use different size blocks of wood and a 50" pry bar to slowly lower it down. You'd end up cutting away the pallet. Use the hoist if you can get it in place. My friend had an older hoist that wasn't vee shaped, so it could stradle the lathe. I did the reverse process of pulling a lathe out of a unpaved driveway uphill. Used a truck to pull it and 2 2'x4' sheets of 3/4" plywood. Wayne D. |
#32
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Lathe on the way
On 2008-03-23, Bob in Phx wrote:
don, I agree that taking the headstock apart was very hard, but the amount of grit we found warranted the work. The biggest culprit was that the factory had painted over, on the inside, pockets of grit. Once the paint was touched at all, it opened up and let the grit go. Ouch! I had not read reports of grit in the gearhead versions of the lathe until a couple of articles after I posted the one to which you just replied. Had I read that first, I obviously would not have posted it as it sat. I would think that by just running the lathe, that the painted in grit pockets would have released and caused issues. Just my opinion as a sort of owner ( I go and use the Big lathe just about every weekend, when my little atlas wont do the job). O.K. No certainty whether the paint would have released the grit without testing it -- which is rather an expensive test if it fails. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#33
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Lathe on the way
On 2008-03-23, Bill Schwab wrote:
Don, They do not sell it online because they had problems with people buying the wrong one. Wanting to cash in on the extra 10% off for web orders, I figured I'd wait. However, I will get one to have on hand. If you have a spare on hand, you are less likely to need it. :-) My thinking exactly, sir! Knowing Murphy's law does help. :-) [ ... ] I had no instructions (a used lathe, after all, but what I did was to jack up each end of the pallet and put cribbing under it -- first 2x4, then 4x4 then 2x4 on top of 4x4. Once I could do that, I could slide the legs under the long custom pallet to which the lathe was bolted. That makes sense, and I will probably end up doing that. Did you start out with a pry-bar to get it off the ground, or is there a slicker way? A pry-bar plus a length of 2x4 acting as a longer pry-bar. But it was easier to get hooked into the upper layer of the pallet for the first motion. Dumb question: any trick to keeping the pull from simply tearing apart the pallet? One thought I had was a 2x4 shoved in the pallet and a sling over it up to the hoist - that should get it going, assuming the wood can take it. Well ... I was watching for things pulling out, and didn't have them. I think that I can thank the pallet being assembled with rusty nails. :-) I would have used the engine hoist from the start for unloading from the pickup -- Good to know. At the risk of appearing to cross-examine (in reality I simply want to understand to get the most out of your helpful descriptions), unload from the _pickup_??? Would you still have done the ramp transfer, or would you have gone flatbed-ground-hoist? The delivery truck had a bed which was about at the height of my forehead, with no hydraulic tailgate. The lathe was simply one of a number of machines and other loads strapped to the bed of the truck and under tarps. The trip down the ramp from the delivery truck's bed to the pickup (a tall 4WD 3/4 ton pickup by Mazda) was the shortest descent, helped by the steep driveway. The truck pulled up across my driveway at the street, and I backed the pickup down the driveway until one end of the ramp was on the edge of the delivery truck and the other end was against the front of the bed of my pickup so it could not slide. We set up high density foam to protect the front of the bed and the cab, and gently slid the lathe down the ramp after levering the end of the pallet up just enough to start it onto the top of the ramp. He had places to anchor a rope for tailing so we could control the rate of descent. And the bed of the delivery truck was *way* too high for the engine hoist to have lifted the lathe clear when you add the height of the lathe plus the sling to the 5'5" of bed height from pavement. Also, there was no way to back the delivery truck (an 18-wheeler flatbed) up the driveway for delivery -- even ignoring all of the other stuff on the delivery truck. except that I had to unload the pickup to drive over to a friend's place to borrow the engine hoist. I've since acquired my own. :-) Ok, now I'm starting to think that you would have done the ramp between the two trucks, and then used to hoist from your pickup to the ground. Is that it? Yes. The hoist just could not have done the other end, unless I had some way to mount it on the pickup, which I did not. If that orientation had not been possible, I would have lowered it onto cribbing again, removed the engine hoist, and using a rolling floor jack, removed 2" of cribbing height per cycle. I can largely picture that, but what is the goal? If you can't straddle the lathe with the legs, would not want to keep it on cribbing and/or just lift it to your truck? Or, are you simply giving instructions for getting back down in that case? It had to be lifted to unbolt the pallet. Once it was in the air, the choices were to lower it onto the legs of the hoist (counter productive) or onto cribbing so the hoist could be removed. I still do not quite follow (sorry). Unless the idea was to lower onto cribbing to have stable foundation while you unbolted the pallet? No. The lathe with pallet was lowered onto the legs of the engine hoist, giving easier access to removing the bolts which held it to the pallet. Then it was lifted just enough to allow the pallet to be slid out from under it, then rotated so the headstock end would fit between the extended legs, and lowered to the concrete floor. If it would not fit between the legs, the only choice would have been to lower it onto cribbing, remove the hoist, and then lower it to the floor one piece of cribbing at a time. Without the cribbing, the lathe would held the hoist captive forever, since it would have to sit on the legs. I am assuming that you slung the lathe, and the pallet is just along for the ride; Yes. in my case, there was no way to make a support clamp (as has been shown by someone else for a lathe similar to yours (I think that was one of Fitch's postings perhaps six to ten years ago.) So, what I did was to take some 2" webbing (military surplus with two sliding eyes on it), sling it under the chip pan (the chip pan, lathe, and pedestal were a single piece, unlike your kit delivery) and bring the two sliding eyes up -- one behind and one in front of the lathe, slid towards the headstock end, so the straps at that end held the headstock upright, and so the balance was mostly at the headstock end. There was no tailstock at the time, but there was a turret, which I believe that I removed. I can't be sure now, however. one could then unbolt with the whole thing swinging, but it would be very dangerous to do that - the load could fall, or shift and then fall as the pallet does weirdness being partially attached to that lathe. However, I would probably leave the hoist holding some tension on the lathe, just in case all hell broke loose with the pallet while I was unbolting it. The pallet was resting on the legs of the engine hoist, with tension on the strap to keep the lathe upright when the bolts were undone. As it was, nothing shifted until I had all the bolts out (and the steel strapping cut) and I started to lift the lathe clear of the pallet. then, once I had enough clearance, I slid the pallet out, swung the headstock towards the column (I had started with the column on the operator's side of the lathe IIRC. The balance was pretty even front to back, because the motor lived low in the pedestal, along with the big step reduction pulleys. We had no choice -- since the work needed to remove not only that room's raised floor, but the one before it through which it came would have been a major problem -- especially with the conduit and plumbing below the floor. At least there was a nice long ramp before the first room which would serve as the first test of whether it would support what was being moved. Scary thought, but I get the idea. And -- it was pros doing the delivery. I just stood back and watched. They had a lot less difficulty moving the lathe and the milling machine (a Bridgeport clone with Anilam CNC) than they did moving the optical tables -- honeycomb aluminum between steel plates of about 1/4" thickness or perhaps 5/16", with 1/4-20 holes drilled and tapped about every two inches in a grid pattern on the top. The honeycomb was 12" high between the plates. Then the bottom plate was attached to six steel column legs with pneumatic height control in each leg to isolate from floor vibration. They even made moving those look pretty easy -- but they took their time, and never got themselves between the load and anything else. :-) I really enjoy my Jacobs chuck, and will probably end up buying another one to live on a 3MT arbor - later. Wait until you've done a few projects with the Rohm keyless chuck. (I do presume that the Rohm is keyless and the Jacobs is keyed, though both make both styles. And I have a nice Jacobs keyless on my drill press (which came with a 5/8" or 3/4" clone of a Jacobs chuck -- always too big for metalworking with the slowest speed available from the spindle. :-) Please be careful, as my evil twin is the one who buys all this stuff; I am fairly certain he settled for a keyed chuck Humor aside, I might be in for a pleasant surprise, but I was trying to balance price and quality, and the Enco tech suggested the Rohm as a worthy compromise. Worst case, it will become a backup to my Jacobs. I've got a 3/8" Rohm which is the largest of three tailstock chucks in my little Emco-Maier Compact-5/CNC lathe. The other two are a 1/4" Albrecht an a 1/8" Albrecht -- each giving progressively more room between the headstock and the chuck, and progressively better gripping of smaller drills. I've comfortably used a #70 drill bit in the 1/8" chuck, and would feel comfortable with even a #80 -- it was just that the #70 was the smallest that I needed to use at that time. The Rohm is pretty much equal in quality to the Albrecht, and is the keyless chuck which I have had the longest. Remember, to *properly* tighten a Jacobs style keyed chuck, you are supposed to tighten it in each of the three key stations. Not much of a problem in a drill press, but awkward to reach when mounted on the tailstock. The keyless tightens by a twist of the wrist, with no tool (key) to get lost in the chip tray. And, if it needs to be any tighter, the work load tightens it automatically. Some of the cheaper clones can over-tighten and need a strap wrench to loosen, but the real Albrecht and the Rhom have never needed that -- nor the 1/2" Jacobs keyless which is in the drill press (except when a tapping head is in it. :-) [ ... ] True, but it still has been useful at times. For that matter, I learned a lot from the manual for my Unimat SL-1000, including tricks which I have not seen documented in manuals for larger machines. :-) The "manual" with the lathe will give you details about the lathe, but not instructions on how to use it. It is actually pretty good - one of the best I have seen on a Chinese machine. Hmm ... a significant improvement from one for the Jet from around 1980-85. I bought my last Jet machine a couple of years ago. The clincher was when I called them to point out that they had an safety latch that needed to remain in place bolted at one point, and that it would eventually pivot. Nutty me, I thought they would want to know - they didn't care, nor did they seem to even grasp how stupid the design might be, nor that they might want to find somebody who might understand same. Anyway, it *did* fail as I predicted. Oops! BTW I would suggest that you retire the 4-station turret toolpost And instead get a BXA sized quick-change toolpost to put on there. If you've got the money, start with an Aloris starter [ ... ] I believe that to be excellent advice. It sounds very familiar from my earlier research on this purchase. Given what the IRS is going to do to me in a few weeks, it will have to wait. I almost didn't buy the lathe to be honest. O.K. So keep your eyes open for sales for the Phase-II wedge style set. I got mine from such a sale -- choosing to pay more for the wedge style over the piston style. Great minds... I fully expect to go that route, I was lucky that Dave Ficken had a sale on the Phase II sets shortly after I got the lathe. And -- I still had enough money to get it. :-) He has stopped being a machine seller (mostly used, but some new accessories like the quick-change toolposts), and gone back to merchant marine work. I just have to slow down the flow of green stuff out of my wallet for a while. If the Phase-II is anything like the RT they make, it will be very much worth the money. I assume/hope that I will be able to function with the existing post while I fumble my way along with learning what the new toy can do. O.K. Stock up on shim stock of various thicknesses, as you will need a stack of shims to bring each tool to the proper height. At least some who use such toolposts make a practice of keeping each tool in a pill bottle with the needed stack of shims, so they don't lose the time needed to select the right shims each time. And for inexpensive shim stock, cut open a soda can. I think that you will find the aluminum walls to be 0.001" thick. After I recover from April 15 and brace for the local guys mugging me later in the year, I can start looking for sales. Hmm ... your state. like Virginia, has the state tax deadline later than the federal? I wonder how many states do that these days? [ ... ] If you had two side by side, and firmly clamped that way, it would be a lot better than one at a time. That is what I did. One of the parts is a singleton, but I would no doubt give it a shorter peer to help stabilize it. The other reason to cut two at a time was that I wanted them to be the same length, whatever that turned out to be. Now that I think about it, if I put that improvised stop in the center, it should be able to work for both tubes, allowing me to the lengths the same - I think O.K. Mount it sideways in the vise, mill one side of each (plus a little over half-way through the other two sides, then set up a stop on the table so you can mount each piece to line up with the previous cut when you do the final cut. To clarify, I would bring the stop into contact with the lower end of the first cut, tighten, and then move the part, right? My usual stops would probably trick me; they work nicely, but always seem to move a little when tightened - not a problem the way I use them. However, a v-block and a parallel or something held in place with clamps should do it. I would just make a cut through a bit over half of the height of each one not worrying about the end stop then. Then rotate one piece 90 degrees, so there is both a top and a bottom section machined together. Set the stop to press on a bottom section of the machined area, lock it, and then move the X-axis to bring the edge of the end mill just barely contact with the end. IIRC, cigarette rolling papers are supposed to be good for this -- moisten one, and stick it on the end of the machined surface, and bring the X-axis in until the endmill just whisks the paper away -- you are then within 0.001". Now -- lock the X-axis, stop the spindle, crank the Y-axis clear in such a direction so you will be doing conventional milling not climb milling when you bring the mill back into contact, loosen the vise, and rotate the workpiece so the long un-milled part is on top and the long machined part is on the bottom in contact with the work stop. Tighten the vise, mill through the un-machined work (with a little overlap), loosen the vise, crank the Y-axis back to where it was before, and clamp the next half-done workpiece against the stop. Repeat until all are done on that end. Then carefully cut to final length on one side of the other end of all parts (perhaps setting the stop at the already milled in now if all are to be the same length), and machine each one top flip bottom and on to the next. Dumb question: after the first cut puts the machined surface right at the edge of the tool, right? Only at the top and a little over half-way down each side. Would not a stop set against it (firm but not deformed) be in just the right place w/o moving the table? I need to read it a few more times, but you appear to have added a step. What does that fix? 1) You have to unclamp the workpiece and rotate it 90 degrees and reclamp to bring a portion of the machined edge to the bottom for setting the stop there.. If you have the stop set at the top, it will be setting with the rough saw cut material, not the machined material from the first pass. You want the stop set at the bottom, where it can be setting from the already-machined edge to keep things lined up for the next cut. (And then you have to rotate the first workpiece another 90 degrees before you actually cut, so the fully machined edge is at the bottom, and the fully un-machined edge is at the top. 2) You said that you were having problems with the stop moving a bit as you tightened it, so this was to allow you to compensate for that motion (once) by re-establishing your zero point. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#34
Posted to rec.crafts.metalworking
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Lathe on the way
On 2008-03-23, Bill Schwab wrote:
Don, From what I have read, the gear-head machines have been made with more attention to such matters than the belt-driven ones from the same source -- and the larger lathes better made than the smaller ones. All that extra money pays for more than just more cast iron. :-) FWIW, I have gotten to know one of the Enco techs, and he seems to think the lathe I bought is a good one. I will ask him about this, but suspect he will agree with you. O.K. I would suggest taking apart and checking the compound and the cross slide. If those are well done, you probably have pretty good chances with the rest. Maybe take apart and check the tailstock as well. That seems reasonable. Except that another posting shows that there can be significant grit trapped inside a gearhead lathe. Taking apart the gear-head headstock to sufficient level of detail is a major undertaking. I feared as much. Is there a good compromise: open a panel and look for signs of trouble? You'll have to ask the fellow who has done it, and who posted last night (unless he has already answered in this thread). What he found was blisters of paint holding large clumps of sand in the corners of the gearcase. If that is the case, it *might* stay put with only slow cutting all the time, but with high spindle speeds stirring up the lubricant, it might well pop those blisters and let the sand get into circulation with the oil. I wonder whether there is a filter to capture that grit? I've never seen the inside of a gear-head lathe. Good luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#35
Posted to rec.crafts.metalworking
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Lathe on the way
Don,
I would have used the engine hoist from the start for unloading from the pickup -- Good to know. At the risk of appearing to cross-examine (in reality I simply want to understand to get the most out of your helpful descriptions), unload from the _pickup_??? Would you still have done the ramp transfer, or would you have gone flatbed-ground-hoist? The delivery truck had a bed which was about at the height of my forehead, with no hydraulic tailgate. The lathe was simply one of a number of machines and other loads strapped to the bed of the truck and under tarps. That is a somewhat scary picture considering that the truck has to turn =:0 I have never looked at the dynamics, but I am left wondering whether the weight of the tractor is somehow responsible for keeping the whole mess from tipping over. The trip down the ramp from the delivery truck's bed to the pickup (a tall 4WD 3/4 ton pickup by Mazda) was the shortest descent, helped by the steep driveway. The truck pulled up across my driveway at the street, and I backed the pickup down the driveway until one end of the ramp was on the edge of the delivery truck and the other end was against the front of the bed of my pickup so it could not slide. We set up high density foam to protect the front of the bed and the cab, and gently slid the lathe down the ramp after levering the end of the pallet up just enough to start it onto the top of the ramp. He had places to anchor a rope for tailing so we could control the rate of descent. Thanks for the detail. My remaining question is how you got the ramp off the flatbed? Was it simply that the lathe was far enough away to give you mechanical advantage, or did this involve the classic "Hey ya'll, watch this!" - wait, you survived, so it couldn't have been that Yes. The hoist just could not have done the other end, unless I had some way to mount it on the pickup, which I did not. Got it. I still do not quite follow (sorry). Unless the idea was to lower onto cribbing to have stable foundation while you unbolted the pallet? No. The lathe with pallet was lowered onto the legs of the engine hoist, giving easier access to removing the bolts which held it to the pallet. Then it was lifted just enough to allow the pallet to be slid out from under it, then rotated so the headstock end would fit between the extended legs, and lowered to the concrete floor. If it would not fit between the legs, the only choice would have been to lower it onto cribbing, remove the hoist, and then lower it to the floor one piece of cribbing at a time. Understood. Without the cribbing, the lathe would held the hoist captive forever, since it would have to sit on the legs. I think I (finally!!! - thanks for patience) follow. I guess what I should have been asking is, ok, the lathe's on the ground and you have removed the hoist - now what? However, if you could not straddle it, I suppose the hoist would be useless for mounting on a stand?? I guess one could crib the stand? The pallet was resting on the legs of the engine hoist, with tension on the strap to keep the lathe upright when the bolts were undone. As it was, nothing shifted until I had all the bolts out (and the steel strapping cut) and I started to lift the lathe clear of the pallet. Makes sense. then, once I had enough clearance, I slid the pallet out, swung the headstock towards the column (I had started with the column on the operator's side of the lathe IIRC. The balance was pretty even front to back, because the motor lived low in the pedestal, along with the big step reduction pulleys. Front to back balance will be interesting. Hope springs eternal It suddenly occurs to me that I might be able to run the slings to make the lathe want to be in the headstock-near-column position. I often end up putting slings over the bolt on my hoist vs. catching them with the hook. And -- it was pros doing the delivery. I just stood back and watched. They had a lot less difficulty moving the lathe and the milling machine (a Bridgeport clone with Anilam CNC) than they did moving the optical tables -- honeycomb aluminum between steel plates of about 1/4" thickness or perhaps 5/16", with 1/4-20 holes drilled and tapped about every two inches in a grid pattern on the top. The honeycomb was 12" high between the plates. Then the bottom plate was attached to six steel column legs with pneumatic height control in each leg to isolate from floor vibration. They even made moving those look pretty easy -- but they took their time, and never got themselves between the load and anything else. :-) Those isolation tables are great fun if you like making holograms. IIRC, the one in my lab of old was delivered via crane and somehow poked through the 3rd floor window. Remember, to *properly* tighten a Jacobs style keyed chuck, you are supposed to tighten it in each of the three key stations. I actually do that. Really Not much of a problem in a drill press, but awkward to reach when mounted on the tailstock. I hadn't thought of that. I knew there was a reason I went the cheaper route. Would it be reasonable to simply remove the chuck from the tailstock, tighten, and then re-mount it? Annoyance aside, will the MT arbor re-align properly? I bought my last Jet machine a couple of years ago. The clincher was when I called them to point out that they had an safety latch that needed to remain in place bolted at one point, and that it would eventually pivot. Nutty me, I thought they would want to know - they didn't care, nor did they seem to even grasp how stupid the design might be, nor that they might want to find somebody who might understand same. Anyway, it *did* fail as I predicted. Oops! Hopefully I am not the only one who looks at it and realizes it will fail when most needed. Like I said, it was my last purchase from Jet. O.K. Stock up on shim stock of various thicknesses, as you will need a stack of shims to bring each tool to the proper height. At least some who use such toolposts make a practice of keeping each tool in a pill bottle with the needed stack of shims, so they don't lose the time needed to select the right shims each time. Nice. I keep my taps and associated drill bits in plastic bags, so that shouldn't bother me too much. And for inexpensive shim stock, cut open a soda can. I think that you will find the aluminum walls to be 0.001" thick. Thanks for mentioning that. After I recover from April 15 and brace for the local guys mugging me later in the year, I can start looking for sales. Hmm ... your state. like Virginia, has the state tax deadline later than the federal? I wonder how many states do that these days? FL has been smart enough to avoid taxing income. However, they really smack us around on property taxes. Dumb question: after the first cut puts the machined surface right at the edge of the tool, right? Only at the top and a little over half-way down each side. That's the part that has been machined, and rotating brings the "surface formerly known as the top" into contact with the stop. Would not a stop set against it (firm but not deformed) be in just the right place w/o moving the table? I need to read it a few more times, but you appear to have added a step. What does that fix? 1) You have to unclamp the workpiece and rotate it 90 degrees and reclamp to bring a portion of the machined edge to the bottom for setting the stop there.. If you have the stop set at the top, it will be setting with the rough saw cut material, not the machined material from the first pass. You want the stop set at the bottom, where it can be setting from the already-machined edge to keep things lined up for the next cut. (And then you have to rotate the first workpiece another 90 degrees before you actually cut, so the fully machined edge is at the bottom, and the fully un-machined edge is at the top. I think what I might end up doing is setting the stop under the top surface but on the machined portion from the first pass, at center line of the two pieces. I _think_ if I rotate them in opposite directions, it will allow me to clean them up using the one stop. 2) You said that you were having problems with the stop moving a bit as you tightened it, Very true - thanks for following that closely. I bought the $18 wonders from Enco, and ended up with two of them, one configured for something small in the center of my vise, and the other expecting a longer part "spilling out" of the vise. Because they move when tightened, I set them and then put a clean edge in contact with them to edge find and zero the x-axis. However, I think I can improvise something with a block, a parallel or similar item, and a clamp. I should be able to tap the stop into contact and then tighten the clamp w/o too much fear of storing up strain energy. so this was to allow you to compensate for that motion (once) by re-establishing your zero point. That helps. I will re-read with that in mind. Thanks!!! Bill |
#36
Posted to rec.crafts.metalworking
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Lathe on the way
On 2008-03-24, Bill Schwab wrote:
Don, [ ... ] The delivery truck had a bed which was about at the height of my forehead, with no hydraulic tailgate. The lathe was simply one of a number of machines and other loads strapped to the bed of the truck and under tarps. That is a somewhat scary picture considering that the truck has to turn =:0 I have never looked at the dynamics, but I am left wondering whether the weight of the tractor is somehow responsible for keeping the whole mess from tipping over. Mostly the weight of the whole load on the flatbed, plus the wide spread of the rear wheels (two axles with four wheels each). During a steep turn, two rear axles of the tractor are parallel to the bed of the truck so they don't offer much help other than the weight of the engine and cab fighting twisting in one direction and the front wheels fighting twisting in the other direction. But you don't take that sharp a turn at any speed at all. (Hmm ... also the distance between the front and rear-most of the tractor's rear axles might be enough to help a bit too. But -- I'm not sure how much of a twist load the fifth-wheel which connects the trailer to the tractor can take. Depend on trained drivers who know how slow to take turns. :-) The trip down the ramp from the delivery truck's bed to the pickup (a tall 4WD 3/4 ton pickup by Mazda) was the shortest descent, helped by the steep driveway. The truck pulled up across my driveway at the street, and I backed the pickup down the driveway until one end of the ramp was on the edge of the delivery truck and the other end was against the front of the bed of my pickup so it could not slide. We set up high density foam to protect the front of the bed and the cab, and gently slid the lathe down the ramp after levering the end of the pallet up just enough to start it onto the top of the ramp. He had places to anchor a rope for tailing so we could control the rate of descent. Thanks for the detail. My remaining question is how you got the ramp off the flatbed? Was it simply that the lathe was far enough away to give you mechanical advantage, or did this involve the classic "Hey ya'll, watch this!" - wait, you survived, so it couldn't have been that It was near contacting the tailgate, and with the headstock weight near the cab, it was not that difficult to lift the tail end of the pallet a little and close the tailgate under it to hold it up. I carefully tied the lathe to keep it close to the cab, since I was going to be driving up a steep driveway with it. I also had a floor jack which I could have put under the tailgate end of the pallet to lift it clear. But I tend to not believe in "Hey ya'll, watch this!" type of operations. :-) I also won't drink even beer until the task is done, just as when I go shooting. [ ... ] Without the cribbing, the lathe would held the hoist captive forever, since it would have to sit on the legs. I think I (finally!!! - thanks for patience) follow. I guess what I should have been asking is, ok, the lathe's on the ground and you have removed the hoist - now what? However, if you could not straddle it, I suppose the hoist would be useless for mounting on a stand?? I guess one could crib the stand? Remember -- the pedestal of this lathe was firmly attached to the rest of it -- complete with two drawers full of heavy accessories at the tailstock end. I never had to even consider lifting the lathe without the pedestal. [ ... ] then, once I had enough clearance, I slid the pallet out, swung the headstock towards the column (I had started with the column on the operator's side of the lathe IIRC. The balance was pretty even front to back, because the motor lived low in the pedestal, along with the big step reduction pulleys. Front to back balance will be interesting. Hope springs eternal It suddenly occurs to me that I might be able to run the slings to make the lathe want to be in the headstock-near-column position. I often end up putting slings over the bolt on my hoist vs. catching them with the hook. The thing which Fitch made for lifting his with a hoist was a pair of thick steel plates to go above and below the bed rails, joined by a long threaded section of a long eye bolt. The plates were clamped onto the bed by a nut above and a nut below, and the eye was above the highest part of the headstock so the weight balance was not such as would make it easy to turn over. Also -- he clamped it near a headstock-to-tailstock balance pont and moved the carriage to fine tune the balance. [ ... ] attached to six steel column legs with pneumatic height control in each leg to isolate from floor vibration. They even made moving those look pretty easy -- but they took their time, and never got themselves between the load and anything else. :-) Those isolation tables are great fun if you like making holograms. IIRC, the one in my lab of old was delivered via crane and somehow poked through the 3rd floor window. Hmm -- something which I certainly would not want to be under. our building was all concrete floor at a single level. It had been used during WW-II for experiments with tanks and lighting systems mounted on them, so the floor was *thick*. Remember, to *properly* tighten a Jacobs style keyed chuck, you are supposed to tighten it in each of the three key stations. I actually do that. Really Good! As do I. And this is why I don't like Jacobs style in a tailstock. Not much of a problem in a drill press, but awkward to reach when mounted on the tailstock. I hadn't thought of that. I knew there was a reason I went the cheaper route. Would it be reasonable to simply remove the chuck from the tailstock, tighten, and then re-mount it? Annoyance aside, will the MT arbor re-align properly? That depends on how accurate the tailstock taper and the drill chuck arbor are. With mine, I have only two possible orientations, because there is a slot in the tailstock ram for the tang on the Morse taper. However, I've used some lathes where the tailstock ram is bored to allow the tang to enter at any angle. If you have the slot, install the chuck to the arbor so in one of the two positions one of the key holes points straight up, and then you will re-install it in the same orientation. Then the only thing to worry about is chips getting into the taper during the operation. But I change from drill chuck to live center to (sometimes) Morse taper shanked drill bits in the larger sies, and occasionally other things -- including a small 3-jaw chuck mounted on an interchangeable point live center to support a tubular workpiece from the inside while I threaded the end of the OD. I bought my last Jet machine a couple of years ago. The clincher was when I called them to point out that they had an safety latch that needed to remain in place bolted at one point, and that it would eventually pivot. Nutty me, I thought they would want to know - they didn't care, nor did they seem to even grasp how stupid the design might be, nor that they might want to find somebody who might understand same. Anyway, it *did* fail as I predicted. Oops! Hopefully I am not the only one who looks at it and realizes it will fail when most needed. Like I said, it was my last purchase from Jet. How big a Jet machine was this? Generally, the larger the better from what I have seen. O.K. Stock up on shim stock of various thicknesses, as you will need a stack of shims to bring each tool to the proper height. At least some who use such toolposts make a practice of keeping each tool in a pill bottle with the needed stack of shims, so they don't lose the time needed to select the right shims each time. Nice. I keep my taps and associated drill bits in plastic bags, so that shouldn't bother me too much. Good. And for inexpensive shim stock, cut open a soda can. I think that you will find the aluminum walls to be 0.001" thick. Thanks for mentioning that. It is useful for sudden needs for shim stock when the stores are either closed or too long a drive. After I recover from April 15 and brace for the local guys mugging me later in the year, I can start looking for sales. Hmm ... your state. like Virginia, has the state tax deadline later than the federal? I wonder how many states do that these days? FL has been smart enough to avoid taxing income. However, they really smack us around on property taxes. Hmm ... IIRC, Texas had no income tax, too -- though I don't know whether that has changed since. Dumb question: after the first cut puts the machined surface right at the edge of the tool, right? Only at the top and a little over half-way down each side. That's the part that has been machined, and rotating brings the "surface formerly known as the top" into contact with the stop. Yes -- but the rotating means that you have lost the position which you already had, which is why you have to re-set it. Would not a stop set against it (firm but not deformed) be in just the right place w/o moving the table? I need to read it a few more times, but you appear to have added a step. What does that fix? 1) You have to unclamp the workpiece and rotate it 90 degrees and reclamp to bring a portion of the machined edge to the bottom for setting the stop there.. If you have the stop set at the top, it will be setting with the rough saw cut material, not the machined material from the first pass. You want the stop set at the bottom, where it can be setting from the already-machined edge to keep things lined up for the next cut. (And then you have to rotate the first workpiece another 90 degrees before you actually cut, so the fully machined edge is at the bottom, and the fully un-machined edge is at the top. I think what I might end up doing is setting the stop under the top surface but on the machined portion from the first pass, at center line of the two pieces. So you can cheerfully machine away the stop, too? :-) I see it as run through all of the pieces machining the top with just a rough setting, then establish the position for the stop, and finally machine the new top once the stop can assure that it remains in line with the first. I _think_ if I rotate them in opposite directions, it will allow me to clean them up using the one stop. ??? -- three cuts instead of two? The original cut full width at the top, then two other positions for subsequent cuts? I think that the way I have it would take fewer changes and thus less time and less chance for errors. 2) You said that you were having problems with the stop moving a bit as you tightened it, Very true - thanks for following that closely. I bought the $18 wonders from Enco, and ended up with two of them, one configured for something small in the center of my vise, and the other expecting a longer part "spilling out" of the vise. Because they move when tightened, I set them and then put a clean edge in contact with them to edge find and zero the x-axis. Which was what I was expecting, with nothing other than the stock you are machining to transfer the positions. However, I think I can improvise something with a block, a parallel or similar item, and a clamp. I should be able to tap the stop into contact and then tighten the clamp w/o too much fear of storing up strain energy. I would not trust it if it is one of those stops which have an angled piece holding the stop rod above the table and closer to the workpiece. so this was to allow you to compensate for that motion (once) by re-establishing your zero point. That helps. I will re-read with that in mind. Good Luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#37
Posted to rec.crafts.metalworking
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Lathe on the way
Don,
Mostly the weight of the whole load on the flatbed, plus the wide spread of the rear wheels (two axles with four wheels each). During a steep turn, two rear axles of the tractor are parallel to the bed of the truck so they don't offer much help other than the weight of the engine and cab fighting twisting in one direction and the front wheels fighting twisting in the other direction. But you don't take that sharp a turn at any speed at all. (Hmm ... also the distance between the front and rear-most of the tractor's rear axles might be enough to help a bit too. But -- I'm not sure how much of a twist load the fifth-wheel which connects the trailer to the tractor can take. Depend on trained drivers who know how slow to take turns. :-) I watched a truck make a turn in front of me just last night. Sad to say, I had never thought about it before, but the turn does create a wider wheelbase and the engine is at least in a position to provide a counter weight. I suspect this is why the truck/tractor connection is done with plates: transfer torque to exploit that counter weight, not to mention control the tractor. That said, the driver indeed took it easy on speed during the turn It was near contacting the tailgate, and with the headstock weight near the cab, it was not that difficult to lift the tail end of the pallet a little and close the tailgate under it to hold it up. I carefully tied the lathe to keep it close to the cab, since I was going to be driving up a steep driveway with it. Got it. But I tend to not believe in "Hey ya'll, watch this!" type of operations. :-) I also won't drink even beer until the task is done, just as when I go shooting. Words to (continue to) live by. Without the cribbing, the lathe would held the hoist captive forever, since it would have to sit on the legs. I think I (finally!!! - thanks for patience) follow. I guess what I should have been asking is, ok, the lathe's on the ground and you have removed the hoist - now what? However, if you could not straddle it, I suppose the hoist would be useless for mounting on a stand?? I guess one could crib the stand? Remember -- the pedestal of this lathe was firmly attached to the rest of it -- complete with two drawers full of heavy accessories at the tailstock end. I never had to even consider lifting the lathe without the pedestal. You did say that Thanks for saying it again. The thing which Fitch made for lifting his with a hoist was a pair of thick steel plates to go above and below the bed rails, joined by a long threaded section of a long eye bolt. The plates were clamped onto the bed by a nut above and a nut below, and the eye was above the highest part of the headstock so the weight balance was not such as would make it easy to turn over. Also -- he clamped it near a headstock-to-tailstock balance pont and moved the carriage to fine tune the balance. Ok. Good! As do I. And this is why I don't like Jacobs style in a tailstock. I'm glad I went easy on the cash. The chuck and live center arrived yesterday; they look pretty good. Not much of a problem in a drill press, but awkward to reach when mounted on the tailstock. I hadn't thought of that. I knew there was a reason I went the cheaper route. Would it be reasonable to simply remove the chuck from the tailstock, tighten, and then re-mount it? Annoyance aside, will the MT arbor re-align properly? That depends on how accurate the tailstock taper and the drill chuck arbor are. With mine, I have only two possible orientations, because there is a slot in the tailstock ram for the tang on the Morse taper. However, I've used some lathes where the tailstock ram is bored to allow the tang to enter at any angle. If you have the slot, install the chuck to the arbor so in one of the two positions one of the key holes points straight up, and then you will re-install it in the same orientation. Excellent idea! Then the only thing to worry about is chips getting into the taper during the operation. That is always a risk. I use a shop vac to remove what I can before removing anything that might let chips have a party. How big a Jet machine was this? Generally, the larger the better from what I have seen. A bandsaw, nothing huge. Still, the damn thing is just plain dangerous as designed. I think what I might end up doing is setting the stop under the top surface but on the machined portion from the first pass, at center line of the two pieces. So you can cheerfully machine away the stop, too? :-) I see it as run through all of the pieces machining the top with just a rough setting, then establish the position for the stop, and finally machine the new top once the stop can assure that it remains in line with the first. I _think_ if I rotate them in opposite directions, it will allow me to clean them up using the one stop. ??? -- three cuts instead of two? The original cut full width at the top, then two other positions for subsequent cuts? I think that the way I have it would take fewer changes and thus less time and less chance for errors. I might change my tune when I try it, but I do not think the stop gets clobbered, as the subsequent cuts would be shallow by comparison to the first/witness cut. If I am visualizing it properly, machined surfaces index into place to contact the stop which lives below the endmill. I would not trust it if it is one of those stops which have an angled piece holding the stop rod above the table and closer to the workpiece. That sounds about right for my normal stops, and yes, I would not trust them in this situation. When I tighten them "in the breeze" there is no problem, but against a clamped part, I would expect them to deform with error as the result. Thanks!! Bill |
#38
Posted to rec.crafts.metalworking
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Lathe on the way
On 2008-03-26, Bill Schwab wrote:
Don, [ ... ] Depend on trained drivers who know how slow to take turns. :-) I watched a truck make a turn in front of me just last night. Sad to say, I had never thought about it before, but the turn does create a wider wheelbase and the engine is at least in a position to provide a counter weight. I suspect this is why the truck/tractor connection is done with plates: transfer torque to exploit that counter weight, not to mention control the tractor. That said, the driver indeed took it easy on speed during the turn As any good driver should. I guess that a lowboy flatbed would allow a bit more speed, but still not a good idea. [ ... ] But I tend to not believe in "Hey ya'll, watch this!" type of operations. :-) I also won't drink even beer until the task is done, just as when I go shooting. Words to (continue to) live by. :-) [ ... ] Good! As do I. And this is why I don't like Jacobs style in a tailstock. I'm glad I went easy on the cash. The chuck and live center arrived yesterday; they look pretty good. Great! I know that Rhom is good based on what I have (the 3/8" one). Not sure who made our live center, but hopefully that is also a good one. [ ... ] tailstock, tighten, and then re-mount it? Annoyance aside, will the MT arbor re-align properly? That depends on how accurate the tailstock taper and the drill chuck arbor are. With mine, I have only two possible orientations, because there is a slot in the tailstock ram for the tang on the Morse taper. However, I've used some lathes where the tailstock ram is bored to allow the tang to enter at any angle. If you have the slot, install the chuck to the arbor so in one of the two positions one of the key holes points straight up, and then you will re-install it in the same orientation. Excellent idea! In my case, the slot for the tang is horizontal -- with access via a pair of milled slots to allow a drift key to be used to pop things out at need. Then the only thing to worry about is chips getting into the taper during the operation. That is always a risk. I use a shop vac to remove what I can before removing anything that might let chips have a party. Good -- but noisy. :-) How big a Jet machine was this? Generally, the larger the better from what I have seen. A bandsaw, nothing huge. Still, the damn thing is just plain dangerous as designed. Hmm ... is this their version of the 4x6 horizontal/vertical bandsaw? I've got the MSC version and the prop to hold it in the vertical position is metal and good and solid. I think what I might end up doing is setting the stop under the top surface but on the machined portion from the first pass, at center line of the two pieces. So you can cheerfully machine away the stop, too? :-) I see it as run through all of the pieces machining the top with just a rough setting, then establish the position for the stop, and finally machine the new top once the stop can assure that it remains in line with the first. I _think_ if I rotate them in opposite directions, it will allow me to clean them up using the one stop. ??? -- three cuts instead of two? The original cut full width at the top, then two other positions for subsequent cuts? I think that the way I have it would take fewer changes and thus less time and less chance for errors. I might change my tune when I try it, but I do not think the stop gets clobbered, as the subsequent cuts would be shallow by comparison to the first/witness cut. If I am visualizing it properly, machined surfaces index into place to contact the stop which lives below the endmill. O.K. I was assuming that the height of the endmill would be the same for both passes -- so anything which the stop could be set to in the initial orientation would be within reach of the endmill in the second orientation. I would not trust it if it is one of those stops which have an angled piece holding the stop rod above the table and closer to the workpiece. That sounds about right for my normal stops, and yes, I would not trust them in this situation. When I tighten them "in the breeze" there is no problem, but against a clamped part, I would expect them to deform with error as the result. O.K. A solid block which bolts down with a T-stud followed by adjusting a threaded rod to contact, and tightening a locknut to keep it there would probably have little deformation -- unless you crank too hard on the rod before locknuting it. There may still be a 0.001" to 0.002" offset unless you have a constant pressure against the stop each time. Hmm -- or mount a dial indicator to measure the end of the workpiece, zero it, and withdraw the contact during machining. Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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