Home |
Search |
Today's Posts |
|
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. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
After a lot of repairs, bruised hands, ruined clothes and much $$$
spent on Clausing replacement parts, the lathe drive system is working truly great. No noise, no vibration, easy speed changes, etc etc. It is now a pleasure to use. The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. My last question for today is what to use to lubricate the gears in the back (going to quick gearbox). I cleaned them with brake cleaner, i |
#2
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
After a lot of repairs, bruised hands, ruined clothes and much $$$ spent on Clausing replacement parts, the lathe drive system is working truly great. No noise, no vibration, easy speed changes, etc etc. It is now a pleasure to use. The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. My last question for today is what to use to lubricate the gears in the back (going to quick gearbox). I cleaned them with brake cleaner, i Congatulations on your finishing the repairs on the lathe. Hope it runs a long time without problems. A good grade of bearing grease will work fine. You need a heavier grease that will stay on the gears. I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. John |
#3
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-20, john wrote:
Ignoramus30516 wrote: After a lot of repairs, bruised hands, ruined clothes and much $$$ spent on Clausing replacement parts, the lathe drive system is working truly great. No noise, no vibration, easy speed changes, etc etc. It is now a pleasure to use. The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. My last question for today is what to use to lubricate the gears in the back (going to quick gearbox). I cleaned them with brake cleaner, i Congatulations on your finishing the repairs on the lathe. Hope it runs a long time without problems. A good grade of bearing grease will work fine. You need a heavier grease that will stay on the gears. I guess I can use that MObil 1 synthetic, the pink one? i would like it to be some off color like that, so i can see if dirt or chips get into it. I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. way cool , some pictures would help! i John |
#4
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. What is wrong with it? Did someone bugger the pin holes around the periphery? 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 |
#5
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-20, Wes wrote:
Ignoramus30516 wrote: The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. What is wrong with it? Did someone bugger the pin holes around the periphery? Wes yep, big time |
#6
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
On 2010-02-20, Wes wrote: Ignoramus30516 wrote: The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. What is wrong with it? Did someone bugger the pin holes around the periphery? Wes yep, big time I guess I can assume you didn't get the pin spanner that is used to tighten or loosen the nut with your lathe? Have you built one yet? Wes |
#7
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On Feb 20, 4:13*pm, Ignoramus30516 ignoramus30...@NOSPAM.
30516.invalid wrote: On 2010-02-20, Wes wrote: ... What is wrong with it? *Did someone bugger the pin holes around the periphery? Wes yep, big time The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. jsw |
#8
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-20, Wes wrote:
Ignoramus30516 wrote: On 2010-02-20, Wes wrote: Ignoramus30516 wrote: The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. What is wrong with it? Did someone bugger the pin holes around the periphery? Wes yep, big time I guess I can assume you didn't get the pin spanner that is used to tighten or loosen the nut with your lathe? Have you built one yet? Wes I have a spanner, but the lathe came without one. I think that they used a punch and hammer to work this nut, with predictable results. Cast iron is wrong material for this nut. I will take it off and will look. If I make a replacement, it will be from 1018 steel. i |
#9
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-20, Jim Wilkins wrote:
On Feb 20, 4:13?pm, Ignoramus30516 ignoramus30...@NOSPAM. 30516.invalid wrote: On 2010-02-20, Wes wrote: ... What is wrong with it? ?Did someone bugger the pin holes around the periphery? Wes yep, big time The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. The nut also has cracks on its face, which I consider to be safety issues. I do not have a suitable round, however, and buying one costs $50. (5x3 or so) i |
#10
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
I have a spanner, but the lathe came without one. I think that they used a punch and hammer to work this nut, with predictable results. Cast iron is wrong material for this nut. Mine seems to be steel and shows some damage. Not too bad though. I will take it off and will look. If I make a replacement, it will be from 1018 steel. Can you either, 1. Re-cut existing holes on bridgeport to a larger diameter. 2. Cut new standard holes using BP to original diameter offset in between old holes. 3. Remove nut from spindle, braze up holes with bronze filler and recut using BP. Wes |
#11
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Jim Wilkins wrote:
The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. I slap my head, wondering why I didn't suggest that. It is only 1/2 of the hole that is used at any time. Excellent solution! Wes |
#12
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, Wes wrote:
Ignoramus30516 wrote: I have a spanner, but the lathe came without one. I think that they used a punch and hammer to work this nut, with predictable results. Cast iron is wrong material for this nut. Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg I will take it off and will look. If I make a replacement, it will be from 1018 steel. Can you either, 1. Re-cut existing holes on bridgeport to a larger diameter. I could, but see below. 2. Cut new standard holes using BP to original diameter offset in between old holes. 3. Remove nut from spindle, braze up holes with bronze filler and recut using BP. I do not think that 3 is easy to do. The main problem is that the face of this nut has cracks and I think that it is unsafe as is. It wil be a great exercise to make one from steel, the only thing is that I do not have a suitable round piece to work with. Igor |
#13
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
On 2010-02-20, Jim wrote: On Feb 20, 4:13?pm, Ignoramus30516ignoramus30...@NOSPAM. 30516.invalid wrote: On 2010-02-20, wrote: ... What is wrong with it? ?Did someone bugger the pin holes around the periphery? Wes yep, big time The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. The nut also has cracks on its face, which I consider to be safety issues. I do not have a suitable round, however, and buying one costs $50. (5x3 or so) i what is the size of the thread on the spindle? John |
#14
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg HTH, Wes |
#15
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, Wes wrote:
Ignoramus30516 wrote: Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg Wow, thanks. It is not as easy to make, with those internal reliefs etc. (see near point marked 45 degrees). What is "Unified Form Special" thread? Anyway, my original plan was to make a steel "band" around the existing nut. The band would have the right width and would simply clamp the nut by means of socket head cap screw that would be perpendicular to the radius. I can draw a picture. Seems a little uglier, but less troublesome to make. i |
#16
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, John wrote:
Ignoramus30516 wrote: On 2010-02-20, Jim wrote: On Feb 20, 4:13?pm, Ignoramus30516ignoramus30...@NOSPAM. 30516.invalid wrote: On 2010-02-20, wrote: ... What is wrong with it? ?Did someone bugger the pin holes around the periphery? Wes yep, big time The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. The nut also has cracks on its face, which I consider to be safety issues. I do not have a suitable round, however, and buying one costs $50. (5x3 or so) i what is the size of the thread on the spindle? You mean on the chucks? 3 3/4 - 6 TPI. |
#17
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
On 2010-02-21, wrote: wrote: Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg Wow, thanks. It is not as easy to make, with those internal reliefs etc. (see near point marked 45 degrees). What is "Unified Form Special" thread? Anyway, my original plan was to make a steel "band" around the existing nut. The band would have the right width and would simply clamp the nut by means of socket head cap screw that would be perpendicular to the radius. I can draw a picture. Seems a little uglier, but less troublesome to make. i the special means that it not a commonly used thread size. The common size for a 3 3/4 inch diameter shaft is a 4 tpi thread. The problem you have is to have a gauge when you cut the thread. You have to gauge it with the spindle shaft and you have you chuck mounted to it cutting the thread. If I were machine it I would just cut the minor diameter in the nut and then with an indicator on the cross slide and then thread outward until I got to the double depth of the desired thread, taking a couple of spring passes at the finish. A thread pitch gauge should fit completely across the threads with no light coming through the thread contact area. Things to watch is that the threading tool is perfectly perpendicular to the nut axis and that the threading tool has the right profile on it. New brazed tools E type are not always ground right from the factory. I ruined and expensive 22 inch dia. nut I was making because the tool was not done right. I had to use a brazed tool because an insert was not readily available for the pitch of the thread. After you cut the thread take about 5 thousandths out of the bore so you don't have problems with the nut jamming from a little dirt in the threads when you use the nut. John |
#18
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus30516 wrote:
On 2010-02-21, wrote: wrote: Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg Wow, thanks. It is not as easy to make, with those internal reliefs etc. (see near point marked 45 degrees). What is "Unified Form Special" thread? Anyway, my original plan was to make a steel "band" around the existing nut. The band would have the right width and would simply clamp the nut by means of socket head cap screw that would be perpendicular to the radius. I can draw a picture. Seems a little uglier, but less troublesome to make. i I would shrink the band on and not worry about the set screw. The usual allowance is .001 thou. per diameter inch interference fit. John |
#19
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Wes wrote:
Ignoramus30516 wrote: Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg HTH, Wes The retention ring on my Kerry 1140 looks just like that drawing and it is hardened. Looks almost unworn and it was made in 1966. I suspect having the correct spanner helps. |
#20
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
In article ,
Ignoramus30516 wrote: On 2010-02-20, Wes wrote: Ignoramus30516 wrote: On 2010-02-20, Wes wrote: Ignoramus30516 wrote: The lathe might have some further problems, but as far as I can tell, they will be minor, and it is now in a usable condition. One known problem is that the chuck holding nut is in a bad shape. I will try to make a replacement instead of buying it. What is wrong with it? Did someone bugger the pin holes around the periphery? Wes yep, big time I guess I can assume you didn't get the pin spanner that is used to tighten or loosen the nut with your lathe? Have you built one yet? Wes I have a spanner, but the lathe came without one. I think that they used a punch and hammer to work this nut, with predictable results. Cast iron is wrong material for this nut. I will take it off and will look. If I make a replacement, it will be from 1018 steel. Later ones are made of aluminum. Including the one on my 5914. There is little stress so long as the chuck is well seated on the L00 (L0?) taper. You should be able to buy a used ring from a parted-out 6900-series lathe. Is there a photo showing the worrying cracks? This may be due to using the ring to pop the chuck off the spindle nose. The problem is that only part of one thread engages when this is done, so the strain is very high. Joe Gwinn |
#21
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, Joseph Gwinn wrote:
Later ones are made of aluminum. Including the one on my 5914. There is little stress so long as the chuck is well seated on the L00 (L0?) taper. You should be able to buy a used ring from a parted-out 6900-series lathe. Is there a photo showing the worrying cracks? This may be due to using the ring to pop the chuck off the spindle nose. The problem is that only part of one thread engages when this is done, so the strain is very high. My own forensic analysis makes me rather certain of what happened. They used a pin and hammer to tighten and remove the nut. That ruined the holes for the spanner and caused the face to crack. I do use a spanner, but I need a wood clamp to hust hold it in place so that it does not slip. Tge cracks are on the face of the nut due to what I mentioned in the first paragraph. i |
#22
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. way cool , some pictures would help! i John Iggy, Here are the pictures of the splined sleeve repair. this picture shows the crack in the splined sleeve http://userweb.intergrafix.net/amdinc/001.jpg this shows the key that got sheared of and rotated 90 deg. and caused the crack http://userweb.intergrafix.net/amdinc/003.jpg the top gear is the one that spun on the sleeve sheairing the keyway http://userweb.intergrafix.net/amdinc/002.jpg The new splined sleeve is on the left. The spline was wire EDM'ed and the inside drop is behind the sleeve. I cheated a little and put a standard N20 bearing nut and thread on the new sleeve. The old one was metric and I didn't want to bother doing a metric thread. http://userweb.intergrafix.net/amdinc/005.jpg This is the shaft that the sleeve and gears go on to. http://userweb.intergrafix.net/amdinc/006.jpg I hope to make the new keys today. Several other ones got slightly damaged too and they are all metric. John |
#23
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
John, this is very nice, good work.
i |
#24
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ignoramus15530 wrote:
John, this is very nice, good work. i Iggy, Thanks for the compliment, but half of it I don't deserve. Another shop did the wire EDM spline. I did some repair work on their CNC machines for them in exchange. John |
#25
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, John wrote:
Ignoramus30516 wrote: On 2010-02-20, Jim wrote: On Feb 20, 4:13?pm, Ignoramus30516ignoramus30...@NOSPAM. 30516.invalid wrote: On 2010-02-20, wrote: ... What is wrong with it? ?Did someone bugger the pin holes around the periphery? Wes yep, big time The spanner pin holes on the spindle thread protector on my lathe were worn into ramps. I fixed them inconspicuously by milling them longer. The nut also has cracks on its face, which I consider to be safety issues. I do not have a suitable round, however, and buying one costs $50. (5x3 or so) i what is the size of the thread on the spindle? No thread on the spindle. This is a L-00 spindle nose, and it has a loose collar with a female thread which threads onto the male thread on the chuck backplate, with a shoulder on the spindle bearing on a lip on the threaded collar. The actual spindle nose is a long tape with a key mounted in it to provide repeat orientation when mounting chucks, and prevent slipping and spinning. I would have to go downstairs to measure the actual thread. O.K. 3-3/4" x 6 TPI based on a dog-driving faceplate which was easier to handle than a full sized chuck. (Actual *measured* OD on the thread was 3.749" using Mitutoyo digital calipers. Not really worth digging out a 3-4" Micrometer to be more precse. :-)) 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
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, Ignoramus30516 wrote:
On 2010-02-21, Wes wrote: Ignoramus30516 wrote: Mine seems to be steel and shows some damage. Not too bad though. Mine is very trashed. http://igor.chudov.com/projects/Clau...Chuck-0012.jpg That is nasty. Use this drawing someone passed on to me a few years ago. Make appropriate measurements and deviate when required. http://www.garage-machinist.com/manu...ndle_noses.jpg A useful drawing -- saved and printed against future need. Wow, thanks. It is not as easy to make, with those internal reliefs etc. (see near point marked 45 degrees). I think that the 45 degrees is not critical -- and is just clearance for the radius between the spindle OD and the flange against which the lib pears. The relief there is mostly for runout when turning the threads, and the rest is to keep dings on the edge of the threaded part of the chuck from keeping it from seating properly. For this, you may want to make a special HSS tool to reach in there -- perhaps a small one in a 45-degree boring bar. What is "Unified Form Special" thread? "Unified" is a thread form designed to work both with UK and US threads -- 60 degree threads, truncated crest instead of the rounded crest of the UK threads and truncated bottom as well, instead of the rounded bottom to clear the rounded crest on the UK threads. They were common in the shop manual for my MGA all those years ago. They will be easier to cut than the UK thread. As for the "Special" part -- this combination of diameter and thread pitch is not a "standard", which means that you won't find a tap for it without having to spend a lot in a special order from a tap manufacturer. But, since you are cutting the threads on a lathe, this does not matter. Do you have a small dog-driving faceplate for the spindle? This will make an easy test fixture which you can use without having to remove the workpiece from the spindle. I also notice that this as drawn has milled slots (for claw type spanners) instead of the holes for pin type spanners which are on mine. Don't worry -- just use a center-cutting (two flute) end mill to plunge cut the holes to fit without hitting the threads. Anyway, my original plan was to make a steel "band" around the existing nut. The band would have the right width and would simply clamp the nut by means of socket head cap screw that would be perpendicular to the radius. I can draw a picture. Seems a little uglier, but less troublesome to make. If the flange is cracking -- make a new one. If the threaded part is cracking, you can probably get away with the reinforcing ring, but I would prefer making a new one anyway. It might be nice to make it of a good bronze instead of steel. Less likely for the threads to gall and bind, not that this would be a problem with steel chuck threads and cast iron ring. 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 --- |
#27
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
On 2010-02-21, John wrote:
Ignoramus30516 wrote: [ ... ] What is "Unified Form Special" thread? [ ... ] the special means that it not a commonly used thread size. The common size for a 3 3/4 inch diameter shaft is a 4 tpi thread. Correct. The problem you have is to have a gauge when you cut the thread. You have to gauge it with the spindle shaft and you have you chuck mounted to it cutting the thread. The nut is a loose collar around the spindle except when it is pulling a chuck up tight. The male thread is on the chuck backplate (look up "L-00 spindle nose"). So -- what he needs is a spare chuck, chuck backplate, or dog driver faceplace (the latter is probably the smallest) to use as a check while the workpiece is still in the chuck. 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 --- |
#28
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
"john" wrote in message ... I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. way cool , some pictures would help! i John Iggy, Here are the pictures of the splined sleeve repair. this picture shows the crack in the splined sleeve http://userweb.intergrafix.net/amdinc/001.jpg this shows the key that got sheared of and rotated 90 deg. and caused the crack http://userweb.intergrafix.net/amdinc/003.jpg the top gear is the one that spun on the sleeve sheairing the keyway http://userweb.intergrafix.net/amdinc/002.jpg The new splined sleeve is on the left. The spline was wire EDM'ed and the inside drop is behind the sleeve. I cheated a little and put a standard N20 bearing nut and thread on the new sleeve. The old one was metric and I didn't want to bother doing a metric thread. http://userweb.intergrafix.net/amdinc/005.jpg This is the shaft that the sleeve and gears go on to. http://userweb.intergrafix.net/amdinc/006.jpg I hope to make the new keys today. Several other ones got slightly damaged too and they are all metric. John John, nice pictures. About EDM work. What is a reasonable price cutting (EDM) that part. Hundreds of dollars? A thousand? Did you give them a cylinder with which to work? Did they make the entire part? I was told that EDM is very slow. Does it take days to burn a pattern such as yours? Just curious, thanks. Ivan Vegvary |
#29
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
Ivan Vegvary wrote:
"john" wrote in message ... I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. way cool , some pictures would help! i John Iggy, Here are the pictures of the splined sleeve repair. this picture shows the crack in the splined sleeve http://userweb.intergrafix.net/amdinc/001.jpg this shows the key that got sheared of and rotated 90 deg. and caused the crack http://userweb.intergrafix.net/amdinc/003.jpg the top gear is the one that spun on the sleeve sheairing the keyway http://userweb.intergrafix.net/amdinc/002.jpg The new splined sleeve is on the left. The spline was wire EDM'ed and the inside drop is behind the sleeve. I cheated a little and put a standard N20 bearing nut and thread on the new sleeve. The old one was metric and I didn't want to bother doing a metric thread. http://userweb.intergrafix.net/amdinc/005.jpg This is the shaft that the sleeve and gears go on to. http://userweb.intergrafix.net/amdinc/006.jpg I hope to make the new keys today. Several other ones got slightly damaged too and they are all metric. John John, nice pictures. About EDM work. What is a reasonable price cutting (EDM) that part. Hundreds of dollars? A thousand? Did you give them a cylinder with which to work? Did they make the entire part? I was told that EDM is very slow. Does it take days to burn a pattern such as yours? Just curious, thanks. Ivan Vegvary Ivan I honestly don't know the cost as I work back and forth with that shop all the time, I installed a bullard Vertical boring mill last month for them including supplying all the electrical equipment. I made the part as well as gave them a cad drawing of the spline. With a height of about 6 inches it will cut very slowly. I think it took about 8 hours to do the spline. I could have cut the spline on my vertical slotter but the wire edm does a lot nicer job. John |
#30
Posted to rec.crafts.metalworking
|
|||
|
|||
Lathe now works great...
"John" wrote in message ... Ivan Vegvary wrote: "john" wrote in message ... I just got the part for my machine back after having the inside spline EDM'ed. I could have cut it myself but the EDM does such a nice job and you can't get it any more perfect than that. Next week I will get that transmission back together if I can remember where all the parts go. I still have to make up a couple of oddball keyways to replace the damaged ones. way cool , some pictures would help! i John Iggy, Here are the pictures of the splined sleeve repair. this picture shows the crack in the splined sleeve http://userweb.intergrafix.net/amdinc/001.jpg this shows the key that got sheared of and rotated 90 deg. and caused the crack http://userweb.intergrafix.net/amdinc/003.jpg the top gear is the one that spun on the sleeve sheairing the keyway http://userweb.intergrafix.net/amdinc/002.jpg The new splined sleeve is on the left. The spline was wire EDM'ed and the inside drop is behind the sleeve. I cheated a little and put a standard N20 bearing nut and thread on the new sleeve. The old one was metric and I didn't want to bother doing a metric thread. http://userweb.intergrafix.net/amdinc/005.jpg This is the shaft that the sleeve and gears go on to. http://userweb.intergrafix.net/amdinc/006.jpg I hope to make the new keys today. Several other ones got slightly damaged too and they are all metric. John John, nice pictures. About EDM work. What is a reasonable price cutting (EDM) that part. Hundreds of dollars? A thousand? Did you give them a cylinder with which to work? Did they make the entire part? I was told that EDM is very slow. Does it take days to burn a pattern such as yours? Just curious, thanks. Ivan Vegvary Ivan I honestly don't know the cost as I work back and forth with that shop all the time, I installed a bullard Vertical boring mill last month for them including supplying all the electrical equipment. I made the part as well as gave them a cad drawing of the spline. With a height of about 6 inches it will cut very slowly. I think it took about 8 hours to do the spline. I could have cut the spline on my vertical slotter but the wire edm does a lot nicer job. John Two points about wire EDM work of that type: Unless they're using a good machine, and know what they're doing, you can get quite a bit of non-straightness over a 6-inch span. Modern wire EDMs can cut steel at over 25 sq. in./hour but making straight cuts over that length requires multiple passes, going slow. It would require those passes anyway, because internal sharp corners on those splines are going to be vulnerable to microcracks, and the part can wind up being really weak if they just take a pass as fast as they can. If they took 8 hours to do the job, they probably did it really right. I don't know shop rates these days but it was $35/hour for wire work, 10 years ago, plus setup. Judge accordingly. -- Ed Huntress |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
A/C won't stay cold during the day/at night works great? | Home Repair | |||
Soldered component removal: Raychem HT-900B works GREAT!!! | Metalworking | |||
Soldered component removal: Raychem HT-900B works GREAT!!! | Metalworking | |||
cutting thick cable - neat trick, works great | Metalworking | |||
THIS IS REALLY GREAT AND IT REALLY WORKS! | Metalworking |