Atlas 10f - Qc42 Lathe

Bill Rosselot

Bill Rosselot

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Guy I need some more help I'm sorry but I'm going at this a little blind, but going slow. I have some questions on a few of the parts I have found. This is the miter gear that runs the cross feed off of the lead screw shouldn't there be a key in this gear to take power of the lead screw? Also the oil hole does not go through the brass sleeve. Confused need help20160210_212845_resized.jpg 20160210_212815_resized.jpg
 
Bill,

To take your second question first, the bushing in the gear support is porous or sintered bronze (Oilite). It does not need a hole through it.

Yes, there should be a key in the bore of the miter gear. If you look closely in the bore, you should be able to see where it once was. Several members here or on the Yahoo Group have reported successfully repairing this by broaching a keyway. At least one secured the key with very small flat head screws. Another securing method actually used by Clausing in one or two of their lathes is to bend the ends of a standard square key up to make the key look like a very short shallow channel. Then mill the inner bend radius out square, with the legs just far enough apart to slip over the ends of the gear. And short enough on the gear end to clear the other miter gear. But you still have to cut a keyway in the gear.
 
wa5cab said:
Bill,

To take your second question first, the bushing in the gear support is porous or sintered bronze (Oilite). It does not need a hole through it.

Yes, there should be a key in the bore of the miter gear. If you look closely in the bore, you should be able to see where it once was. Several members here or on the Yahoo Group have reported successfully repairing this by broaching a keyway. At least one secured the key with very small flat head screws. Another securing method actually used by Clausing in one or two of their lathes is to bend the ends of a standard square key up to make the key look like a very short shallow channel. Then mill the inner bend radius out square, with the legs just far enough apart to slip over the ends of the gear. And short enough on the gear end to clear the other miter gear. But you still have to cut a keyway in the gear.
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Bob I have looked with a magnification and I dont see anything I think that maybe it has been changed in it life time and the replacement gear did not have power feed to the cross slide.
 
Well, maybe so. But if so, why bother? :) Without the key, it can't do anything.

Is the gear steel or Zamak?
 
Bill Rosselot said:
steel a magnet sticks to it
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Bob lots of things on this lathe dont make much sense. Like the reverse tumbler does not have the reverse gear but has a reversing switch. Ive been told that they really doesnt work very well

Bill
 
Are you saying that the tumbler only has the compound gear and one of the tumbler gears? And that the main drive motor is reversible? If so, you're quite right. For one thing, you can't cut left hand threads. Fortunately, that's an easy fix.

Back to the miter gear. If it's steel, it is not the original. But as it's steel (assuming that it's the proper pitch and so forth), you can broach the key way and silver solder the key in. And file out the fillet.
 
wa5cab said:
Are you saying that the tumbler only has the compound gear and one of the tumbler gears? And that the main drive motor is reversible? If so, you're quite right. For one thing, you can't cut left hand threads. Fortunately, that's an easy fix.

Back to the miter gear. If it's steel, it is not the original. But as it's steel (assuming that it's the proper pitch and so forth), you can broach the key way and silver solder the key in. And file out the fillet.
Click to expand...
I looked at it and it looks like it was not oiled in a long time and ran. There is alot of scoring in the bronze bushing and the gear itself is pretty thin through there. I think I'm better off to bite the bullet and buy a new set of gears Ive found all of the gears for the apron and the compete set is only $160 bucks which will give me a complete set of new gears in there with a spare 2 spare half nuts.
 
OK. You're probably money and certainly time ahead by doing that.
 
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