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Seeking knowledge on Southbend Lathe Spindle Bearing/Sleeve Bearing/Expansion Bearing.

RedCrayon

Plastic
Joined
Dec 2, 2022
Good afternoon,

So I screwed up royally... I have been fixing up an old 10 inch Southbend Lathe for the last couple of months. I have been using the ILION Industrial Services renovating guide. Everything was going fine until I was reinstalling my spindle bearings. I overtightened the expansion screws and cracked the rear bearing and expander. I even managed to shear the bolt in the forward expander. I am looking into having a machine shop make new ones. I know I can't know what the nominal dimensions and tolerances are for these bearings, but I want try to have new ones made using what I have as reference. I will include images of the rear bearing and expander. I can take more if needed. Note the warp and bend in the expander, not just the bearing.

I was hoping to know if anyone had any knowledge I could use in my endeavor... (other than don't overtighten lol).

I was also, considering trying to salvage my damages parts. I can use a helicoil in the front bearing expander (if it happens that the threads are damaged).

INFO: The lathe is a 10"R Model (Heavy 10 I believe). I appreciate any advice! Please ask if I failed to include any necessary information.
 

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johansen

Stainless
Joined
Aug 16, 2014
Location
silverdale wa
Seems to me you can peen the material back down, on the bearing, file the bearing and expander as needed, and glue or solder a shim to the side of the expander.

Alternatively you can file the bearing back to a good l dovetail, solder a shim to it, then re install after cleaning up the expander.

Or make a new expander long enough to make contact with the bearing in the 4 places it didn't previously.
 

RedCrayon

Plastic
Joined
Dec 2, 2022
Seems to me you can peen the material back down, on the bearing, file the bearing and expander as needed, and glue or solder a shim to the side of the expander.

Alternatively you can file the bearing back to a good l dovetail, solder a shim to it, then re install after cleaning up the expander.

Or make a new expander long enough to make contact with the bearing in the 4 places it didn't previously.
I've soldered electronics before. Would the process be similar to that? I'm assuming I would need brass shims. Funny enough I was thinking of that but didn't know if soldering would work. Appreciate the help!
 

johansen

Stainless
Joined
Aug 16, 2014
Location
silverdale wa
I've soldered electronics before. Would the process be similar to that? I'm assuming I would need brass shims. Funny enough I was thinking of that but didn't know if soldering would work. Appreciate the help!
I assume it's bronze, which should solder just fine.

Solder is plenty strong for the application, and I would use a copper or brass shim. Get both sides wetted before soldering.
 

RedCrayon

Plastic
Joined
Dec 2, 2022
Found a bronze solder that I can use for Brass and Bronze. I'll see if I can peen it gently, though it is a little cracked. I'll most likely shave off the excess, wet with solder, solder on shims, and shave again to try to approach the original shape again.
 








 
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