Harvey M Sachs wrote:
> I'd also want some bearing at the lower end, something like the
> tailstock on a lathe. There's a fair amount of mass being spun around,
> and it might be a bit off-center. That won't affect the grinding (since
> the dowel and your hands let the grinding "track" the surface. But I'd
> hate for this to get away from me. Just something in case the bolt in
> the chuck gets fatigued. My drill press only has a few speeds, ranging
> from very fast to much too fast, and I'm cautious.
If you have a drill press vise you can mount under the chuck, you could stabilize the bottom end with a piece of tubing wide enough to accept the spindle to make a simple sleeve bearing. Clamp the tube vertically in the vice, leaving just enough of the spindle exposed to allow you access to the race. You may want to grease the inside of the tube to allow the spindle to spin more freely at speed.
--
John (john@os2.dhs.org)
Appleton WI USA