ZeroGravid
Plastic
- Joined
- Jul 11, 2019
- Location
- Kamloops, BC, Canada
Refurbishing a 9A, a UMD with bronze bearings in the headstock. The shims I found in the slots were not original and undersized. The spindle, inserted alone and with the shims and pinch bolts removed, is hard to turn - it does not spin freely. Expanders tight or loose makes no difference. I have been able to get a .054 shim stack in, with great difficulty, but no more and the spindle still won't spin - no change, too tight. I am afraid of any more prying on the casting to insert more shims. The bearing and spindle surfaces seem fine. Advice?