I have been having problems with my lathe. The cross-slide was wiggling enough that it wouldn't square rods. Of course this causes tool chatter, which wears out cutting tools. I have spent a number of hours trying to fix it. It turns out that on Sherline lathes, tightness of apron to carriage and cross-slide to apron is done with gibs, little plastic inserts of progressively larger thickness that can be lightly tapped until you have a tight fit. A little guide wire held by a setscrew prevents tke gib's movement.
I started out fiddling with the apron to carriage gib:
That helped some. The gib for cross-slide to apron was invisible until I backed the cross-slide a bit.
Moving this gib solved the wiggling, but the set screw holding the gib's locating wire was missing. It is a 8-32 x 3/16" length setscrew. Having wiggle problems with your Sherline lathe? I hope this helps.
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