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William Graves wrote:
Actually I am near LAX (Manhattan Beach). I just blew two taps (7BA - 0.102 major diameter, 0.082 tap hole size) into a nice new Staurt Steam Engine casting. None of my tap extractors are small enough and the area by the flutes is almost non-existent! Anyone know a place to get small taps removed in Los Angeles? -- - - - - - - - - - - - - - - - - Bill Graves RKBA! Oyyy Yoyyyy! Are the taps HSS or carbon steel, do you know? Carbon steel taps can often be removed with a burr in a Dremel or similar tool, after heating the part to near a red heat and allowing it to cool slowly. I've carved out a HSS tap or two using dental burrs, but its slow work. I'm sure there must be a shop around with a tap burner. I'd start by calling machine shops in your area to see if they can either help, or recomend someone. Meanwhile, time to start working on a tapping guide. :-) Cheers Trevor Jones |
"William Graves" wrote in message nk.net... Actually I am near LAX (Manhattan Beach). I just blew two taps (7BA - 0.102 major diameter, 0.082 tap hole size) into a nice new Staurt Steam Engine casting. None of my tap extractors are small enough and the area by the flutes is almost non-existent! Anyone know a place to get small taps removed in Los Angeles? -- - - - - - - - - - - - - - - - - Tap Ex 1940 W Rosecrans Gardena, CA 310-323-3834 The area code may not be correct, been years since I used them. -- John R. Carroll Machining Solution Software, Inc. Los Angeles San Francisco www.machiningsolution.com |
William Graves wrote: Tap Ex 1940 W Rosecrans Gardena, CA 310-323-3834 John R. Carroll Yes, he's still there and willing to do the job. He says he is going to retire but has a little too much work right now and so he will wait a little! Glad to see he has a specialized little machine. Most of the suggestions on technique won't work with this tiny little carbon steel tap (0.096 major diameter). I built a little EDM tap burner myself for similar crises. See http://pico-systems.com/edm.html for how I did it. If you have some electrical/electronic junk around, this could work quite well. The smaller the tap, the faster it will burn out. Jon |
Tap Ex
1940 W Rosecrans Gardena, CA 310-323-3834 John R. Carroll Yes, he's still there and willing to do the job. He says he is going to retire but has a little too much work right now and so he will wait a little! Glad to see he has a specialized little machine. Most of the suggestions on technique won't work with this tiny little carbon steel tap (0.096 major diameter). -- - - - - - - - - - - - - - - - - Bill Graves RKBA! |
"William Graves" wrote in message nk.net... Tap Ex 1940 W Rosecrans Gardena, CA 310-323-3834 John R. Carroll Yes, he's still there and willing to do the job. He says he is going to retire but has a little too much work right now and so he will wait a little! Glad to see he has a specialized little machine. Most of the suggestions on technique won't work with this tiny little carbon steel tap (0.096 major diameter). Bill, He's been saying that for 15 years now - almost exactly that same line. The biz is in his blood I think, he won't retire - he will die ( and happy at that). -- John R. Carroll Machining Solution Software, Inc. Los Angeles San Francisco www.machiningsolution.com |
Another tap extractor is in Downey.
Orange Engineering 562 803-1106 "William Graves" wrote in message nk.net... Actually I am near LAX (Manhattan Beach). I just blew two taps (7BA - 0.102 major diameter, 0.082 tap hole size) into a nice new Staurt Steam Engine casting. None of my tap extractors are small enough and the area by the flutes is almost non-existent! Anyone know a place to get small taps removed in Los Angeles? -- - - - - - - - - - - - - - - - - Bill Graves RKBA! |
"Jon Elson" wrote in message ... William Graves wrote: Tap Ex 1940 W Rosecrans Gardena, CA 310-323-3834 John R. Carroll Yes, he's still there and willing to do the job. He says he is going to retire but has a little too much work right now and so he will wait a little! Glad to see he has a specialized little machine. Most of the suggestions on technique won't work with this tiny little carbon steel tap (0.096 major diameter). I built a little EDM tap burner myself for similar crises. See http://pico-systems.com/edm.html for how I did it. If you have some electrical/electronic junk around, this could work quite well. The smaller the tap, the faster it will burn out. Jon Neat idea, Jon, I may try it. I have a friend who has an EDM shop (San Jose area), but I hate to admit I was an idiot and broke the tap... It occurs to me that it might be easier to connect the electrode lead to the mill and insulate the work in the vise. Obviously, one would rather not have arcin' & sparkin' inside the mill quill, but a commutator to the drill chuck shouldn't be too hard to rig... Jerry |
William Graves wrote:
Actually I am near LAX (Manhattan Beach). I just blew two taps (7BA - 0.102 major diameter, 0.082 tap hole size) into a nice new Staurt Steam Engine casting. None of my tap extractors are small enough and the area by the flutes is almost non-existent! Anyone know a place to get small taps removed in Los Angeles? -- - - - - - - - - - - - - - - - - Bill Graves RKBA! If it's an aluminum casting, there was a recent thread here (r.c.m) on boiling in an alum solution to dissolve the tap. Ken Grunke -- take da "ma" offa dot com fer eemayl |
"Ken Grunke" wrote in message ... William Graves wrote: Actually I am near LAX (Manhattan Beach). I just blew two taps (7BA - 0.102 major diameter, 0.082 tap hole size) into a nice new Staurt Steam Engine casting. None of my tap extractors are small enough and the area by the flutes is almost non-existent! Anyone know a place to get small taps removed in Los Angeles? -- - - - - - - - - - - - - - - - - Bill Graves RKBA! If it's an aluminum casting, there was a recent thread here (r.c.m) on boiling in an alum solution to dissolve the tap. Ken Grunke IIRC, nitric acid dissolves steel taps while leaving Al stock alone. I've not tried it, but I think I read it in one of the Machinist's Bedside Readers. LLoyd |
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