Mark,
For the record on reverse threaded nuts, I bought a new low speed grinder and one wheel wobbled horribly. The problem turned out to be caused by a reverse threaded nut holding that wheel on. The hole in that nut had not been drilled perpendicular to the face of the nut and thus the threads weren't perpendicular to the nut, so only a portion of the face of the nut was making contact with the grinding wheel. allowing it to wobble. I located a reverse threaded nut of the right size at my local ACE hardware. The new nut fit perfectly and the wobble was gone. If you have bearing companies and diesel mechanic shops in the area, they might have local sources for reverse threaded nuts too.
Last edited by Ken Fitzgerald; 03-09-2018 at 7:49 PM.
Ken
So much to learn, so little time.....