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Lloyd E. Sponenburgh[_3_]

fired this volley in
:

I know Don. Once the cover is loose the spindle, with the cover and
bearing, slides out.

It only slides out if the inner race of the 'back' bearing (the one on
the end you're trying to push IN) isn't frozen to the spindle.

I've taken the spindles out of some very old lathes. Those with Timken
bearings instead of bushings almost always resist moving that inner race
out to the end... they're corroded-on -- which they would not be if they
had been moved and adjusted for tension occasionally. But most folks
never touch 'spindle tension' once the lathe works once.

There's almost always a ring clamp or some other device to prevent the
spindle from 'migrating' in the inner races. Sometimes it's only a
shoulder on the spindle. Sometimes it's a ring-clamp, set-screw into the
spindle, etc. Remember that just slipping a spindle through two bearings
won't hold it laterally.

Keep in mind that 'only' shoulders on the spindle cannot possibly
accommodate bearing wear unless the outer races are somehow adjustable.
And that's not usually the case. It's usually the case that there's a
jam-nut or 'jam bushing' working against the inner race to keep it and
the rollers in intimate contact with the outer race.

This is most often a key-slotted nut that engages only the inner race,
pushing it to close the distance between the two ends.

And THAT means that there must be a thrust device at BOTH ends to keep
the spindle from moving back and fro in the inner races.

Lloyd