Finatic
Member
I started turning a sierra order today and grabbed a new set of bushings to strart off with. While truning I noticed a slight wobble at one end of the blank and thought I may have bent the mandrel. So, I put a new mandrel in and the same thing happened. I turned the blank and bushings 180* and now the wobble was at the opposite end. I checked the bushings and could tell by eye that one of them was drilled off center. I measured the wall thickness of the tube side of the bushing.....079 and .058 directly across. Explains the wobble. I checked several bushing sets and found most of them to be within .002 at quadrant points.
Just wanted to throw this out there for those having problems with off center turnings. may not always be the Mandrel.
Just wanted to throw this out there for those having problems with off center turnings. may not always be the Mandrel.