In article , DoN. Nichols says...

The impression that I got was that the OD of the bearing was
smaller than the ID of the bore, so it rolled around the bore as the
workpiece rotated.

And it seemed to me that the bearing was oversized by some amount
for the hole, and it was a sort of dynamic ball burnishing
effect.

I would be interested to know the details of the operation
because it sounds like it works pretty well.

Jim


--
==================================================
please reply to:
JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com
==================================================