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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
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Turning thin disks on lathe
I was recently asking about parts for the lead screw clutch on a 12 x 36
Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? Thanks, Bob * - Clausing is a great outfit: I ordered 4 clutch washers at about $1 each & shipping was about $1. $5 total, no minimum, no handling, etc. Some of their parts are very expensive, but you don't have to buy those. |
#2
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Turning thin disks on lathe
On Feb 22, 5:18*pm, Bob Engelhardt wrote:
I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. *Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. *So I think that I'll make those. *They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. *Then turn the ID & OD, in that order. *Does that sound doable? *Would double sided tape work better that super-glue? Thanks, Bob Do you have a slitting saw arbor that could hold them to turn the OD? jsw |
#3
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Turning thin disks on lathe
Jim Wilkins wrote:
Do you have a slitting saw arbor that could hold them to turn the OD? No. I could make an arbor, or just use 3/4" all thread. But, I have to get the ID done & if face turning will do that, I might as well turn the OD while I'm at it. Bob |
#4
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Turning thin disks on lathe
"Bob Engelhardt" wrote in message ... I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? Thanks, Bob or just try parting them off. A 1/4 inch deep is doable, easy. But, is that 0.030 stock a special alloy? If it is you could sandwich it between steel collars to do the o.d. |
#5
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Turning thin disks on lathe
"Phil Kangas" wrote in message ... "Bob Engelhardt" wrote in message ... I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? Thanks, Bob or just try parting them off. A 1/4 inch deep is doable, easy. But, is that 0.030 stock a special alloy? If it is you could sandwich it between steel collars to do the o.d. Probably is a stock item at Mcmaster Carr |
#6
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Turning thin disks on lathe
Bob Engelhardt wrote:
I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? The only thing I've ever successfully super-glued to anything is skin. =:-O Cheers! Rich |
#7
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Turning thin disks on lathe
Bob Engelhardt wrote:
I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? I wonder if circle punches, sometimes known as "arch punches" would do the trick? They'd probably have to some special kind of super-hard alloy, I suppose. Recently, a co-worker who is a real machinist had to make some Viton gaskets; he took a piece of ordinary steel and made a die, and cut the Viton gaskets on the press. But .030 steel isn't Viton! Good Luck! Rich |
#8
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Turning thin disks on lathe
"Rich Grise" wrote in message ... Bob Engelhardt wrote: I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? I wonder if circle punches, sometimes known as "arch punches" would do the trick? They'd probably have to some special kind of super-hard alloy, I suppose. Recently, a co-worker who is a real machinist had to make some Viton gaskets; he took a piece of ordinary steel and made a die, and cut the Viton gaskets on the press. But .030 steel isn't Viton! Good Luck! Rich I had a seal custom cnc'd for a 50mm pneumatic ram a year or so back from some softish rubber, maybe viton. They told us they froze the work to firm it up for machining. |
#9
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Turning thin disks on lathe
On Tue, 22 Feb 2011 17:18:21 -0500, Bob Engelhardt
wrote: I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. Then turn the ID & OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? FWIW I turn 0.020" brass discs, inside and outside, glued to steel discs which are in turn held in a chuck. Their diameters vary from 2.5" to 4.5". I cannot use superglue as it won't hold brass to steel, but steel-to-steel holds well as long as you choose the *right* superglue. I have no experience with steel-to-aluminum. Michael Koblic, Campbell River, BC |
#10
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Turning thin disks on lathe
On Feb 22, 5:18*pm, Bob Engelhardt wrote:
I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. *Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. *So I think that I'll make those. *They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. *Then turn the ID & OD, in that order. *Does that sound doable? *Would double sided tape work better that super-glue? Thanks, Bob * - Clausing is a great outfit: I ordered 4 clutch washers at about $1 each & shipping was about $1. *$5 total, no minimum, no handling, etc. Some of their parts are very expensive, but you don't have to buy those. I use double-sided tape with good results. I always warm up the backing plate and put on a pretty good squeeze to get a good, complete bond, and then cool it back down before working so the adhesive doesn't tend to creep. |
#11
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Turning thin disks on lathe
On Feb 22, 4:18*pm, Bob Engelhardt wrote:
I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. *Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. *So I think that I'll make those. *They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. *Then turn the ID & OD, in that order. *Does that sound doable? *Would double sided tape work better that super-glue? Thanks, Bob * - Clausing is a great outfit: I ordered 4 clutch washers at about $1 each & shipping was about $1. *$5 total, no minimum, no handling, etc. Some of their parts are very expensive, but you don't have to buy those. To do the ID, I'd probably use a Unibit on the drill press. Instead of using super glue, I think that I would capture it in the lathe centered between two pieces of sacrificial stock. One piece held by the chuck and the other piece held in place with the pressure of the tailstock. Clamp the sheet metal piece between them, and then turn the OD. |
#12
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Turning thin disks on lathe
On Wed, 23 Feb 2011 03:53:37 -0800 (PST), "Denis G."
wrote: On Feb 22, 4:18*pm, Bob Engelhardt wrote: I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. *Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. *So I think that I'll make those. *They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum & super-glue the .030 stock to it. *Then turn the ID & OD, in that order. *Does that sound doable? *Would double sided tape work better that super-glue? Thanks, Bob * - Clausing is a great outfit: I ordered 4 clutch washers at about $1 each & shipping was about $1. *$5 total, no minimum, no handling, etc. Some of their parts are very expensive, but you don't have to buy those. To do the ID, I'd probably use a Unibit on the drill press. Instead of using super glue, I think that I would capture it in the lathe centered between two pieces of sacrificial stock. One piece held by the chuck and the other piece held in place with the pressure of the tailstock. Clamp the sheet metal piece between them, and then turn the OD. 2nd that. I'd use a 3/4 bolt and two washers as the arbor and sacrificial metal. Put several nuts on the bolt to hold in the three jaw chuck. |
#13
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Turning thin disks on lathe
On Feb 23, 7:19*am, Karl Townsend
wrote: On Wed, 23 Feb 2011 03:53:37 -0800 (PST), "Denis G." ... To do the ID, I'd probably use a Unibit on the drill press. *Instead of using super glue, I think that I would capture it in the lathe centered between two pieces of sacrificial stock. *One piece held by the chuck and the other piece held in place with the pressure of the tailstock. *Clamp the sheet metal piece between them, and then turn the OD. 2nd that. I'd use a 3/4 bolt and two washers as the arbor and sacrificial metal. Put several nuts on the bolt to hold in the three jaw chuck. I was thinking of drilling and boring the hole first too, maybe in square sheared blanks stacked and clamped to a faceplate under a washer. Then they could be sheared / chiseled / sawn close to a scribed OD line. You can center drill the ends of a bolt and run it between centers to cut a precise work-holding step in the underside of the head. If you turn down the threaded end to fit a collet the arbor can be removed and replaced easily and you don't have to fuss with a driving dog. The driving leverage is poor and the collet can slip so take light cuts. I suppose a 3-jaw would work as long as it doesn't force the tailstock center hole out of line. I use the next larger nut or a big socket as the spacer. jsw |
#14
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Turning thin disks on lathe
Phil Kangas wrote:
or just try parting them off. ... Ya know ... I thought of that & dismissed it 'cause I figured the washer would be distorted. But now that I think about it, there's no cutting forces on the thin part. So I tried it, but I couldn't get the tool to cut straight in - it veered away from the washer, making it thicker as it went. There must be something screwed up in the tool or tool holder geometry. I fooled around with it a bit and then went on to plan B. Thanks, Bob |
#15
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Turning thin disks on lathe
PrecisionmachinisT wrote:
Probably is a stock item at Mcmaster Carr This is pretty unusual dimensions and I thought McM-C would never have this exact washer, but they were close: 3/4 x 1-1/4 x .048 (I was looking for .032). I could have lived with that. But I have already made them. Thanks, Bob |
#16
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Turning thin disks on lathe
Rich Grise wrote:
I wonder if circle punches, sometimes known as "arch punches" would do the trick? ... Yeah ... I really should get a set of those G. But I don't think that they would handle steel. Maybe ... whatta I know. Bob |
#17
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Turning thin disks on lathe
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#18
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Turning thin disks on lathe
Pat wrote:
I use double-sided tape with good results. I always warm up the backing plate and put on a pretty good squeeze to get a good, complete bond, and then cool it back down before working so the adhesive doesn't tend to creep. Thanks - I did try it, with poor results. The cutting heat warmed the adhesive too much & it did creep. I suppose that I could have cooled it during the cut, but I just went on the Plan C. Thanks, Bob |
#19
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Turning thin disks on lathe
Denis G. wrote:
To do the ID, I'd probably use a Unibit on the drill press. Instead of using super glue, I think that I would capture it in the lathe centered between two pieces of sacrificial stock. One piece held by the chuck and the other piece held in place with the pressure of the tailstock. Clamp the sheet metal piece between them, and then turn the OD. (Plan C) I did this & it worked a treat, as they say. I hadn't thought of the Unibit, but it was just right. I turned a 3/4" stub on the piece in the chuck, to center the washers. And a 3/4" recess in the clamping piece, to fit over the stub. Thanks, Bob |
#20
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Turning thin disks on lathe
Karl Townsend wrote:
2nd that. I'd use a 3/4 bolt and two washers as the arbor and sacrificial metal. Put several nuts on the bolt to hold in the three jaw chuck. I only had 3/4" all-thread and it was too small (by 1/64) - I needed to have the washer centered better than that. Thanks, Bob |
#22
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Turning thin disks on lathe
On 02/22/2011 05:10 PM, Rich Grise wrote:
Bob Engelhardt wrote: I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum& super-glue the .030 stock to it. Then turn the ID& OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? The only thing I've ever successfully super-glued to anything is skin. =:-O You're probably using the wrong stuff, then. Regular department store superglue is useless for just about anything except separating consumers from their money. Hobby-shop superglue is superlative for gluing softer woods (like balsa and poplar) together, not too bad for metal-to-wood and metal-to-metal. It is, of course, superlative for gluing just about anything to skin. (Note: at least with the hobby store superglues, if you glue yourself to something you can just wait -- the glue starts to release from skin after ten or twenty minutes; after a few hours there's very little adhesion, and if you have the patience and aren't glued to anything too big after a day or two it just drops off. I don't know if this is from the oils in one's skin, or in the outer layer of dead cells sloughing off and staying stuck to the glue, or what -- but it is handy if you don't have the right solvent). -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" was written for you. See details at http://www.wescottdesign.com/actfes/actfes.html |
#23
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Turning thin disks on lathe
Tim Wescott wrote:
On 02/22/2011 05:10 PM, Rich Grise wrote: Bob Engelhardt wrote: I was recently asking about parts for the lead screw clutch on a 12 x 36 Atlas. Sunworshipper replied the dimensions and I made the main part. I ordered the 4 simple and cheap parts from Clausing*, but they sent 2 of the wrong ones. So I think that I'll make those. They are .030 steel, 3/4" ID, 1-1/4" OD. I'm thinking that I'll chuck up a small hunk of aluminum& super-glue the .030 stock to it. Then turn the ID& OD, in that order. Does that sound doable? Would double sided tape work better that super-glue? The only thing I've ever successfully super-glued to anything is skin. =:-O You're probably using the wrong stuff, then. Regular department store superglue is useless for just about anything except separating consumers from their money. Hobby-shop superglue is superlative for gluing softer woods (like balsa and poplar) together, not too bad for metal-to-wood and metal-to-metal. It is, of course, superlative for gluing just about anything to skin. (Note: at least with the hobby store superglues, if you glue yourself to something you can just wait -- the glue starts to release from skin after ten or twenty minutes; after a few hours there's very little adhesion, and if you have the patience and aren't glued to anything too big after a day or two it just drops off. I don't know if this is from the oils in one's skin, or in the outer layer of dead cells sloughing off and staying stuck to the glue, or what -- but it is handy if you don't have the right solvent). I was once making a perfboard prototype (my first forte is electronics; I'm still learning about machining and welding), and I used some superglue to hold a pin header to the perfboard. I put the glue on the board, stuck the pin header into it, and tried to hold it down between my thumb and finger - it slipped and the pin header fell on the floor. Just at that moment, the boss was walking by, he stooped over and picked up the pin header, asking, "Drop this, Rich?" When he went to toss it back onto my bench, it stuck to his finger. We all had a friendly little laugh, he pulled it loose, and a good time was had by all. :-) I _did_ get the pin header attached (maybe that little fragment of his skin helped! ;-) ) and the prototype worked perfectly, as all my electronic stuff does. (I'll try not to dislocate my shoulder patting myself on the back.) Cheers! Rich |
#24
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Turning thin disks on lathe
On Wed, 23 Feb 2011 11:29:54 -0800, Tim Wescott
wrote: [...] I cannot use superglue as it won't hold brass to steel, but steel-to-steel holds well as long as you choose the *right* superglue. So what's the *right* superglue? I have three, each from different company. Each has different viscosity, each works best in different applications: Thinnest http://www.leevalley.com/en/wood/pag...at=1,110,42966 Medium http://www.kmstools.com/bsi-insta-flex-glue-1oz-10370 Gel https://www.fastcap.com/estore/pc/2P...z-6p12826.htm# Sometimes with accelerator, sometimes without. I have taken to using the 2P-10 instead of epoxy in some applications. Between them they take care of 80% of my gluing needs. Michael Koblic, Campbell River, BC |
#25
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Turning thin disks on lathe
On 2011-02-23, Bob Engelhardt wrote:
Phil Kangas wrote: or just try parting them off. ... Ya know ... I thought of that & dismissed it 'cause I figured the washer would be distorted. But now that I think about it, there's no cutting forces on the thin part. So I tried it, but I couldn't get the tool to cut straight in - it veered away from the washer, making it thicker as it went. There must be something screwed up in the tool or tool holder geometry. The parting blade is square to the length? The blade is not more dull on one side than the other? The blade is not perhaps tilted a bit, so one side rubs below he cut? The blade is truly at right angles to the workpiece axis? All of the above can cause the point to creep. Hmm ... the carriage was locked to prevent *it* moving while you were parting? I tend to prefer the T-profile parting blades for my systems. More expensive, but nice. I fooled around with it a bit and then went on to plan B. O.K. Good Luck, DoN. -- Remove oil spill source from e-mail 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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Turning thin disks on lathe
On Feb 23, 1:19*pm, Bob Engelhardt wrote:
Denis G. wrote: To do the ID, I'd probably use a Unibit on the drill press. *Instead of using super glue, I think that I would capture it in the lathe centered between two pieces of sacrificial stock. *One piece held by the chuck and the other piece held in place with the pressure of the tailstock. *Clamp the sheet metal piece between them, and then turn the OD. (Plan C) I did this & it worked a treat, as they say. *I hadn't thought of the Unibit, but it was just right. *I turned a 3/4" stub on the piece in the chuck, to center the washers. *And a 3/4" recess in the clamping piece, to fit over the stub. Thanks, Bob Glad everything worked out! I was also thinking of something similar to what Jim Wilkins suggested for holding the ID concentric and making a stepped holder out of aluminum so that you could press it between the chuck and the tailstock. I just wasn't sure that you'd want to go thru all the trouble. But, again, I'd glad you got it done. Spacers, washers and bushings are probably the most common things made on my lathe. |
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