Don Foreman wrote:
So: I have this Smithy 1/3 in 1 machine, and the milling section has
problems with the bearings.

Carefully mike the spindle, accurate to .0001 or so if you can.
Compare your measurement to this chart:
http://www.conweb.com/tblefile/bearfta.shtml

If the spindle is in tolerance, buy new bearings. If it's oversize,
new bearings won't help; you'll have to hone the spindle a bit.

Which you might well do in the lathe.

BTW, I suspect a lube problem. My Smithy is now over ten years old with
no bearing problems.

Ted