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Paul_NJ
01-20-2007, 08:47 AM
Is anyone familiar with the reversing gearbox on a 9 inch Atlas lathe?
I recently purchased a used leadscrew reversing gearbox because one
of my gears was bad, and also to "upgrade" to the newer castellated
sliding collar from the half sector type I had (couldn't find replacement
gears for the older type). I just discovered the inside surface of the bronze
bearing bushing on the one I bought is badly scored, as well as the outside of
the long gearshaft that rides inside of it. I'm thinking I will put
the "newer" gear with it's scored shaft into my old box and use that,
as it's bronze bearing is in much better shape.

Will that damage the bronze bushing in the original box? Is it a problem to be
scored like that? . . . it still seems like a firm enough "fit". What would
you think could cause such bad scoring? How do you get lubrication in
there anyway? . . I'll certainly lubricate it when I put it back
together but how do you maintain it? . . . doesn't seem like a place
that can be regularly oiled. Would you use something like Lubriplate
when you assemble it? The more I get into this old lathe the more places
I find that are not that accessible to regular lubrication maintenance!

Thanks

JCHannum
01-20-2007, 11:03 AM
The gearbox has three oil holes on the top. They may be obscured by paint. Make sure they are clear. If they are not there, drill oil holes for the bushings and shifting lever shaft.

Paul_NJ
01-20-2007, 01:11 PM
Thanks . . . didn't know that. . . . I'll do that.

Tinkerer
01-20-2007, 02:01 PM
Mine has two hole on top near each end and one on the face above the selector pivot. If you need to drill yours I'll see about getting a photo if you think that would help any. I give each a drop or two of SAE 10 oil every use.