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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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Drilling flat bottom holes
MSC has a 7/8 end mill 1/2 inch shank #01727486
for $11.92 in my catolog [1999] but you will have to grind the ends flat. And it will probably cut oversize. If size is important Msc has a 3/4 end mill with a 1/2 inch shank and if you grind the end flat and use it as a first cut the 7/8 will cut closer to size. Jim "Marty" wrote in message ... I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty |
#2
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Drilling flat bottom holes
I have to drill a number of flat bottom holes, 7/8" diameter and 1/10"
(.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty |
#3
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Drilling flat bottom holes
In article , madw5
@verizon.net says... I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty If you can live with a small (say 1/4" dia) deeper hole in the middle of the 7/8 hole, you would probably have better luck with a piloted counterbore. _______________________ | | |________| |__| \ / \/ _______________________ It's not too difficult to grind a flat bottom drill, but unless you have a very rigid machine to run it, it's going to push the work all over the place. An end mill that large won't be much better. Ned Simmons |
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Drilling flat bottom holes
Marty wrote:
I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty In a drill press? You're dreaming. You *could* make it happen, but the hassle to do it would be ridiculous. Mill. michael |
#5
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Drilling flat bottom holes
On Mon, 08 Sep 2003 22:11:32 -0700, michael
wrote: Marty wrote: I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty In a drill press? You're dreaming. You *could* make it happen, but the hassle to do it would be ridiculous. Mill. michael Bottom cutting plunge endmill, followed up by the correct drill bit for the screw shank hole. Or a ready made counter sink for the screw. Aint no other way to do it without it walking all over hell and gone. Gunner "At the core of liberalism is the spoiled child - miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosphy of sniveling brats." -- P.J. O'Rourke |
#6
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Drilling flat bottom holes
I have to drill a number of flat bottom holes, 7/8" diameter and 1/10"
(.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty First, drill a 7/8" hole THROUGH a piece of steel plate, say 1/2" thick. Clamp the plate on top of the aluminum piece. Drill with an end mill or a flat bottom drill bit. John Martin |
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Drilling flat bottom holes
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#8
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Drilling flat bottom holes
"Marty" wrote in message ...
I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty Hi Marty, Easy one if you can sharpen a drill by hand. It's called Zero Angle sharpening. I'll put the instructions and a couple of drawings on www.thepiers.net within the next couple of days. With Zero angle sharpening I,ve drilled hundreds of 1/2" holes in 26 gauge material, no burrs. Your only problem may be getting the 7/8" drill with a turned down shank check out http://www.precisiontwistdrill.com/t...p/techhelp.asp. Glenn |
#9
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Drilling flat bottom holes
You want a slot drill, not an end mill. Slot drills look like endmills
but have one or two teeth that extend to the centre. They're used for cutting keyways in shafts, or slots in flat stock; they'll drill through vertically then can be run sideways like an endmill. But it will take a really good, heavy drill press to keep it from walking around. Better to use it to clean out and bottom a previously-drilled, slightly undersize hole. Dan |
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Drilling flat bottom holes
Do a quick search for reduced shank drills at the top of the page.
http://www.mscdirect.com/ Glenn Cramond wrote: "Marty" wrote in message ... I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty Hi Marty, Easy one if you can sharpen a drill by hand. It's called Zero Angle sharpening. I'll put the instructions and a couple of drawings on www.thepiers.net within the next couple of days. With Zero angle sharpening I,ve drilled hundreds of 1/2" holes in 26 gauge material, no burrs. Your only problem may be getting the 7/8" drill with a turned down shank check out http://www.precisiontwistdrill.com/t...p/techhelp.asp. Glenn |
#12
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Drilling flat bottom holes
Marty
Drill your 7/8 hole with a regular drill to the proper depth. Then uses a reground 7/8 drill with flat bottom. It will need a relief gash in the center to enable it to cut properly and I would put a small radius on the corners of the drill to prevent chipping. at this url the second pic from the bopttom shows a bottom drill http://www.rushmachinery.com/prod01.htm Marty wrote: I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for flat bottom drill bits of this size that will fit in the 1/2" drill chuck that's on my drill press? If there are no bits of this size with a turned down 1/2" shank, can an adapter be purchased to go from the 7/8" bit to the 1/2" chuck? Thanks for any help. Marty -- -------------------------------------------------------------------------- James P Crombie Summerside Machinist Prince Edward Island Amateur Astronomer Canada 3D Designer Astronomy webpage http://www.jamescrombie.com Rhinoceros 3D webpage http://www.jamescrombie.com/rhino/ Mirror Grinder page http://www.jamescrombie.com/pics/ -------------------------------------------------------------------------- |
#13
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Drilling flat bottom holes
"James P Crombie" wrote in message ... Marty Drill your 7/8 hole with a regular drill to the proper depth. Then uses a reground 7/8 drill with flat bottom. It will need a relief gash in the center to enable it to cut properly and I would put a small radius on the corners of the drill to prevent chipping. Sadly, while your suggestion is a good one, one that I have used for the bulk of my years in the shop, it won't work in his case. The size of the hole versus the depth won't allow for it. Harold |
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Drilling flat bottom holes
Harold & Susan Vordos wrote: snip You are losing me here. Assuming he can get a two flute end mill with a 1/2 shank and run his drill at the proper RPM why would this setup walk all over the place on a .1 deep hole? A new end mill will have its edges concentric with the center so this should not cause too much grief IMO. -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. While I value your opinion, my over 40 years in commercial machine shops tell me that when you plunge cut with end mills, one side (or flute) generally drives. It can be caused by chip loading, a slightly duller side, a small defect in the cutting edge, the reasons are endless. My suggestion to make a tool that is circularly ground (no peripheral relief) helps avoid the problem. Counterbores are made thus, and for that reason. Working with large tools in a drill press that has little to NO rigidity is a recipe for disaster. I am not of the opinion that it won't work, but I am of the opinion that it works only for those that don't know the difference between a milling machine and a drill press. Once you're used a mill, even one as spindly as a Bridgeport (I can say that, I own one), you'll fully understand what I mean. When you plunge cut with an end mill of the needed size, especially when it's held in a drill chuck, which is NOT intended to hold heat treated items like end mill shanks, the chances of the hole coming out even remotely the right size is almost non-existent. That's true even in a milling machine, especially a spindly one. In a drill press, runout of the chuck holding the end mill alone would likely be trouble. The spindle will allow the end mill to wallow about, and with the side relief of the end mill as it is, it's likely to hog in and create lots more problems than one can settle. Instead of piloting on the hole as it is generated, the end mill simply cuts away anything that gets in the way when it wallows about. Personally, I wouldn't use a drill press for any kind of milling. Even when they make the cut, the degree of precision sucks, and the finish is likely to be something for which you'd be constantly making apologies. Hope this helps you understand my position. Harold Hi Folks, Gotta agree with Harold here! I had the mill set up for some other tasks and needed a quick and dirty counterbore a few nights ago. Had the work clamped well on the table, used a nice US made 3/8 inch 2 flute endmill - fresh out of the tube. Around 500 RPM, kerosene, and 6061 with a clearance hole already in it. Lined it up with the drill bit used to poke the clearance hole, clamped down, verified no deflection of the bit going in and out of the hole. In short, did everything as right as I could for a half assed work around. I just couldn't control the feed finely enough with the drill press spider. Grabbed, wandered a bit, chatter out the wazoo... In short, a mess. Now my drill is just a JET 17 incher, not an industrial grade machine. I tried playing the mill on this drill press game years ago, accepted that it doesn't work well, and saved up for a mill drill. Still not as heavy a machine as I'd like, but the kids want to eat and there's only so much room and money available. Finished the previous work on the mill, then did the job using the same endmill on the mill and knocked out the counterbore just fine, so at least I didn't booger a fresh end mill. A piloted counterbore would do just fine for this application in a drill press, but as I understand it the desired result is really a round pocket, not a counterbore. I really should finish up the counterbores I roughed out a while back for these sorts of tasks, just haven't gotten to it. Don't counterbore often enough to justify the cost of US made commercial ones, and avoid PRC stuff whenever I can. Cheers, Stan |
#15
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Drilling flat bottom holes
"Harold & Susan Vordos" wrote in message ... While I value your opinion, my over 40 years in commercial machine shops tell me that when you plunge cut with end mills, one side (or flute) generally drives. It can be caused by chip loading, a slightly duller side, a small defect in the cutting edge, the reasons are endless. Perhaps I was misunderstood, I was soliciting your opinion to understand why you felt it wouldn't work, not to suggest you were wrong. My suggestion to make a tool that is circularly ground (no peripheral relief) helps avoid the problem. Counterbores are made thus, and for that reason. Working with large tools in a drill press that has little to NO rigidity is a recipe for disaster. I am not of the opinion that it won't work, but I am of the opinion that it works only for those that don't know the difference between a milling machine and a drill press. Once you're used a mill, even one as spindly as a Bridgeport (I can say that, I own one), you'll fully understand what I mean. When you plunge cut with an end mill of the needed size, especially when it's held in a drill chuck, which is NOT intended to hold heat treated items like end mill shanks, the chances of the hole coming out even remotely the right size is almost non-existent. That's true even in a milling machine, especially a spindly one. In a drill press, runout of the chuck holding the end mill alone would likely be trouble. The spindle will allow the end mill to wallow about, and with the side relief of the end mill as it is, it's likely to hog in and create lots more problems than one can settle. Instead of piloting on the hole as it is generated, the end mill simply cuts away anything that gets in the way when it wallows about. Personally, I wouldn't use a drill press for any kind of milling. Even when they make the cut, the degree of precision sucks, and the finish is likely to be something for which you'd be constantly making apologies. Hope this helps you understand my position. Harold Thanks, as much as I like being right I enjoy understanding why I was wrong even more. -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. |
#16
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Drilling flat bottom holes
Opps, didn't see the depth criteria in the original message. The only
other thing I can think of short of a milling machine and endmill is a spur type bit or what B&D calls their bullet drill bits(I think) and that will leave a small hole in the middle, and they would have to be modified a bit to give you a flat bottom. You may be able to get away with a 4 flute endmill by using a drill bushing in a jig, but that could get a little costly and you might be better off subconstracting it out. Harold & Susan Vordos wrote: "James P Crombie" wrote in message ... Marty Drill your 7/8 hole with a regular drill to the proper depth. Then uses a reground 7/8 drill with flat bottom. It will need a relief gash in the center to enable it to cut properly and I would put a small radius on the corners of the drill to prevent chipping. Sadly, while your suggestion is a good one, one that I have used for the bulk of my years in the shop, it won't work in his case. The size of the hole versus the depth won't allow for it. Harold -- -------------------------------------------------------------------------- James P Crombie Summerside Machinist Prince Edward Island Amateur Astronomer Canada 3D Designer Astronomy webpage http://www.jamescrombie.com Rhinoceros 3D webpage http://www.jamescrombie.com/rhino/ Mirror Grinder page http://www.jamescrombie.com/pics/ -------------------------------------------------------------------------- |
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Drilling flat bottom holes
In article , Harold & Susan Vordos
says... ... When you plunge cut with an end mill of the needed size, especially when it's held in a drill chuck, which is NOT intended to hold heat treated items like end mill shanks, the chances of the hole coming out even remotely the right size is almost non-existent. Plus there's a good chance that the end mill will come uncorked out of the chuck - as you say, drill chucks are not designed for this use! Even running a horizontal milling machine with an end mill in the spindle, where the setups are pretty rigid, one can still not depend on the hole being any particular size when plunging. I don't do this unless I'm just spot facing something. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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Drilling flat bottom holes
On Tue, 09 Sep 2003 17:59:25 -0300, James P Crombie
wrote: |Marty | Drill your 7/8 hole with a regular drill to the proper depth. Hard to do that when the hole is only 1/10 inch deep. | Then |uses a reground 7/8 drill with flat bottom. It will need a relief gash |in the center to enable it to cut properly and I would put a small |radius on the corners of the drill to prevent chipping. |at this url the second pic from the bopttom shows a bottom drill |http://www.rushmachinery.com/prod01.htm | |Marty wrote: | I have to drill a number of flat bottom holes, 7/8" diameter and 1/10" | (.1") deep in some 2/10" (.2") thick aluminum. Is there a source for | flat bottom drill bits of this size that will fit in the 1/2" drill | chuck that's on my drill press? If there are no bits of this size with | a turned down 1/2" shank, can an adapter be purchased to go from the | 7/8" bit to the 1/2" chuck? Thanks for any help. Marty | | |-- |-------------------------------------------------------------------------- | |James P Crombie | |Summerside Machinist |Prince Edward Island Amateur Astronomer |Canada 3D Designer | |Astronomy webpage http://www.jamescrombie.com |Rhinoceros 3D webpage http://www.jamescrombie.com/rhino/ |Mirror Grinder page http://www.jamescrombie.com/pics/ |-------------------------------------------------------------------------- | Rex in Fort Worth |
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Drilling flat bottom holes
"Harold & Susan Vordos" wrote in message ... What the hell does a machinist know about house building? Well unlike the bozo's that build tract houses, I bet you have a firm grasp on the concepts of level, plum, and square. G -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. |
#20
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Drilling flat bottom holes
"Roger Shoaf" wrote in message ... "Harold & Susan Vordos" wrote in message ... What the hell does a machinist know about house building? Well unlike the bozo's that build tract houses, I bet you have a firm grasp on the concepts of level, plum, and square. G -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. Ah, that I do! And that also helps explain our slow progress. I'm not convinced that anyone that has perfectionist tendencies should ever get involved with building. It never ceases to amaze me how I can spend so much time on something that construction people knock out in seconds. On the other hand, we also don't rely on the painter covering mistakes made by the drywall people, and them covering mistakes made by the framers. We do it right, no matter how many attempts it takes. :-) Harold |
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Drilling flat bottom holes
Harold & Susan Vordos wrote:
Ah, that I do! And that also helps explain our slow progress. I'm not convinced that anyone that has perfectionist tendencies should ever get involved with building. It never ceases to amaze me how I can spend so much time on something that construction people knock out in seconds. On the other hand, we also don't rely on the painter covering mistakes made by the drywall people, and them covering mistakes made by the framers. We do it right, no matter how many attempts it takes. :-) Harold Get Robin to send you "our" level. It should be someone else's turn by now. Course, that could make things go slower I suppose. michael |
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Old-world craftsmanship (was flat bottom holes...)
In article , Harold & Susan Vordos
says... ... For some, so many years have elapsed since pride was a part of workmanship that it's a relatively unknown commodity anymore. How do we expect anyone to learn a craft properly when the mentors don't know the trade, either? It can be hard to get things square and plumb when you try. Imagine what you get when you don't care! Just remember Harold that things maybe weren't as great as all that. My house was built in the late 1800s, and yes it has rough-cut lumber in it, it's solid, but there's not a right angle in it and if you look close at the workmanship it's strictly so-so. They made up for the fact that they put it up in a day, by using oversize parts. I truly believe that this was a 'knock it together' kind of dwelling. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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Old-world craftsmanship (was flat bottom holes...)
"jim rozen" wrote in message ... In article , Harold & Susan Vordos says... ... For some, so many years have elapsed since pride was a part of workmanship that it's a relatively unknown commodity anymore. How do we expect anyone to learn a craft properly when the mentors don't know the trade, either? It can be hard to get things square and plumb when you try. Imagine what you get when you don't care! Just remember Harold that things maybe weren't as great as all that. My house was built in the late 1800s, and yes it has rough-cut lumber in it, it's solid, but there's not a right angle in it and if you look close at the workmanship it's strictly so-so. They made up for the fact that they put it up in a day, by using oversize parts. I truly believe that this was a 'knock it together' kind of dwelling. Jim Interesting, Jim. Makes one wonder if the construction trades have always been a so-so kind of thing. Strangely, my father worked as a carpenter until he lost his health and eventually succumbed, but my memories of him are such that he was always struggling for perfection. He did rough framing right down to fine finishing and cabinet type work and always kept quality uppermost in his mind. If you want to see an example of someone trying to do a perfect job, a visit to our area would be rewarding. A good friend and neighbor, a retired EE from Boeing, is building a huge exposed beam house. He's been working on it as long as Susan and I have been struggling with our home. This guy is doing it all, starting with large Douglas Fir trees, which he saws with his own mill, permanently set up on his 36 acres. His view is priceless, a perfect one of Mt. St. Helens, which is about 30 miles distant. Wonderful workmanship, mostly with hand type tools, although many are powered, such as his planer, with which he fine tunes the beams. Most impressive. Could it be that things haven't changed, that I'm the one that's screwed up? Harold |
#24
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Drilling flat bottom holes
"Ted Edwards" wrote in message ... Harold & Susan Vordos wrote: My opinion? they don't know what the hell you're talking about. For some, so many years have elapsed since pride was a part of workmanship that it's a relatively unknown commodity anymore. We have done almost all of the construction on this house ourselves. (Down to the taping and mudding now.) Our building inspector, a knowlegable and pleasant guy, would drop in on his way home if he had a bad day just to see what someone was doing who regarded the code as an absolutely minimal starting point. He also liked to see what tools two old farts had invented to do what usually took a crew. :-) Ted Like in your instance, my neighbor, mentioned above, has an unusual rapport with the county housing department head. He often stops by to see the progress on the timber framed home. Yes, I agree, code is minimum. Working beyond code is not a bad idea. The timber framed home mentioned has been engineered to survive a magnitude 8 earthquake. Far and away beyond any local requirements. Could be the EE will get the last laugh. Hard to say! Harold |
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Old-world craftsmanship (was flat bottom holes...)
Harold, I don't think that things have changed since Christ was a carpenter,
literally. I think that there have been jobs that needed perfection and workmen who needed to do "perfect" work, and jobs and workmen who were "journeymen". Framing a house when the key factor is getting it done in three days - you'll get a house that's hopefully sound, reasonably square and plumb, but really needs to be covered with drywall - no exposed joints here! Your friend is building a million dollar house, if he had to pay people to do it - maybe multi-million dollar! Pride of workmanship for the other guys is getting the frame up in three days, meeting the deadline and maybe getting the bonus! In car restoration these days there is a new breed of perfectionist - guys who spend thousands of hours duplicating the scrawled chalk marks, the overspray, the drippy seam-seal, the really rather poor assemblywork of mid-sixties cars - including not only the Chevvies and Fords, but the Ferraris and Maseratis, which were built like tractors! Pride of workmanship isn't dead - I'm often very proud of my workmanship! Cheers, Brian "Harold & Susan Vordos" wrote in message ... Interesting, Jim. Makes one wonder if the construction trades have always been a so-so kind of thing. Strangely, my father worked as a carpenter until he lost his health and eventually succumbed, but my memories of him are such that he was always struggling for perfection. He did rough framing right down to fine finishing and cabinet type work and always kept quality uppermost in his mind. If you want to see an example of someone trying to do a perfect job, a visit to our area would be rewarding. A good friend and neighbor, a retired EE from Boeing, is building a huge exposed beam house. He's been working on it as long as Susan and I have been struggling with our home. This guy is doing it all, starting with large Douglas Fir trees, which he saws with his own mill, permanently set up on his 36 acres. His view is priceless, a perfect one of Mt. St. Helens, which is about 30 miles distant. Wonderful workmanship, mostly with hand type tools, although many are powered, such as his planer, with which he fine tunes the beams. Most impressive. Could it be that things haven't changed, that I'm the one that's screwed up? Harold |
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Old-world craftsmanship (was flat bottom holes...)
If you want to see an example of someone trying to do a perfect job, a visit
to our area would be rewarding. A good friend and neighbor, a retired EE from Boeing, is building a huge exposed beam house. He's been working on it as long as Susan and I have been struggling with our home. This guy is doing it all, starting with large Douglas Fir trees, which he saws with his own mill, permanently set up on his 36 acres. His view is priceless, a perfect one of Mt. St. Helens, which is about 30 miles distant. Wonderful workmanship, mostly with hand type tools, although many are powered, such as his planer, with which he fine tunes the beams. Most impressive. Could it be that things haven't changed, that I'm the one that's screwed up? Harold How long do you think this man will take to finish his house, building it as you describe? Will the resale value be any higher than a similarly-sized knock-together? He obviously is doing it more as a hobby than as a necessity, and lives comfortably in another house for now. He has a retirement income. Whether he moves in tomorrow or next year doesn't matter to him. Most of us don't have these luxuries. I built a house in 1978, post and beam inspired by reading lots of Mother Earth News articles. Took me a year, full time, and I still had to call in some contractor help at the end. I started the house enthusiastic but with no experience, and finished it experienced but totally burned out. My conclusion - the only advantages contractors have is speed and knowledge about how to cover up their mistakes. Craftsmanship never entered into the picture. The good news - my wife and I raised our kids in that house and still love it. Mike Rainey |
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Old-world craftsmanship (was flat bottom holes...)
In article , Beecrofter says...
Frame construction replaced timber frame construction to allow unskilled labor to build houses. And it sure shows in my house! I think they were still getting the process down when it was going up.... Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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Old-world craftsmanship (was flat bottom holes...)
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Old-world craftsmanship (was flat bottom holes...)
In article , Kenneth W. Sterling says...
IMO, there *always* have been perfectionists and wood butchers. Take any old mansion, victorian or otherwise and walk into it with square, level, and tape, and if that doesn't convince you, start taking off some of the trim (some of which is the *only* thing holding the windows in place) and you will see all kinds of scrap nailed into place to provide supports, etc. Again I have seen this in my own house. I had the original front porch replaced several years ago, because it was getting quite tatty. Watching the original porch come apart was a *real* education, it was clear that while the assembly was quick and dirty, whoever built that knew his stuff. 4 vertical posts to hold up a beam that ran around the perimeter as a header, with hip rafters tied from the house to that beam. But the beam was a U-channel section made mostly from leftover scrap from building the house. There were entire sections where the bottom part of the "U" were simply omitted, with the side plates taking all the load. It was boxed in with trimwork to make it look nice-nice but in reality it was an amazing exercise in minimalist engineering. The carpenter's comment was, that even though the roof had been going through, and the supports into the ground were rotting away, it was still pretty solid. He thought that if the roof were re-done and the front jacked up with new supports, it would have lasted a long time still. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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Drilling flat bottom holes
"Harold & Susan Vordos" wrote in message ... Ah, that I do! And that also helps explain our slow progress. I'm not convinced that anyone that has perfectionist tendencies should ever get involved with building. It never ceases to amaze me how I can spend so much time on something that construction people knock out in seconds. On the other hand, we also don't rely on the painter covering mistakes made by the drywall people, and them covering mistakes made by the framers. We do it right, no matter how many attempts it takes. :-) Harold I had a cousin that was a builder and I remember him telling the story about the day the union business agent arrived screaming about my cousins rejection of five "journeyman" carpenters in one day. My cousin explained that he didn't have time to redo work or baby-sit so the first thing he would do was ask the carpenter dispatched from the hall to explain some of the scales on the framing square. If they could not do this they were sent packing. This stopped the business agent in his tracks and he seemed to get a better selection from the subsequent dispatches. -- Roger Shoaf If you are not part of the solution, you are not dissolved in the solvent. |
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Drilling flat bottom holes
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Drilling flat bottom holes
The company I work for buys drills with 1/2 inch shanks to 1-1/2 inch
diameter from various industrial suppliers. 7/8 inch is easily purchased and not terribly pricy. You would have to grind it to zero clearance but thats no big deal once you do it a couple of times. |
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