I've watched a bunch of clock repair videos on YouTube done by dperry428 - they are usually an hour to two hours long and are excellent for learning about how to repair clocks. He has a Sherline Model 4530 lathe that he uses to polish pivots and he often shows a pivot with grooves worn into it and then he shows it spinning in the lathe while he polishes it with emery boards. But he never shows how he mounts the wheel in the chuck of the lathe. Do you insert the end that you are not working on directly into the chuck? Or does the end you are not working on have to go into a jig of some sort to protect it before it goes into the chuck? Also if you don't have a lathe (and I don't), can you use a drill press instead?