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| Rob.Wilson:
--- Quote from: John Stevenson on January 23, 2011, 03:48:39 PM ---Rob, Can you wait until the post gets there Tuesday ? got a stack of those tumbler gears here. John S. --- End quote --- :D sure can John :thumbup: ,i am sure there are other things around the shop i can break in the mean time , pm sent Cheers David ,,,,,,,,,,,,,,,, heed busting ,, a am going backwards :doh: :lol: :lol: :lol: Hi Dave BC ,,,,,,,,,, they are the originals,,, 16 DP (5TPI ) was a tad to much for them :whip: :whip: :lol: :lol: Rob |
| Bluechip:
Hi Rob 5 TPI ?? Thought it was not possible to do a thread coarser than the leadscrew ?? Yours is 8 TPI I suppose ?? Surely the L/S is going faster than the mandrel. Or have I got it all wrong ... AGAIN .. IIRC the coarsest thread I have ever screwcut was 11 tpi .. might have been something like 3/4" BSW long, long ago .. Dave BC |
| Rob.Wilson:
Hi Dave It is possible to cut a courser thread than the lead screw :dremel: ,but it dose put allot of strain on the gear train :doh: 5 tpi is about max for a Myford Rob |
| Bogstandard:
Always happens, just when you are half way thru a job. I did the same sort of thing with my old Atlas, but actually sheared the heads off the gear central bolts. I couldn't believe how lucky I was, seeing the gears are only made from Mazak. Maybe you have should have done it using your leadscrew handle, it takes all the pressure off the gears when cutting coarse threads. John |
| NickG:
Rob, Even the gear quadrant and tool are works of art! Lovely work. It's funny stuff that those gears are made of, I wrecked one of my change wheels trying to get the 3 jaw chuck off my lathe when I first got it, could only find a steel replacement so will have to bear that in mind in future, guess they're made of that for a reason. Nick |
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