Quote Originally Posted by IdahoScrapper View Post
Sounds like the last grinder I had and broke the pins off off the wrench. Does yours have 2 holes in the nut and is smooth/round? Try grabbing it with visegrips.
That nut is made to be turned with equal pressure from each side, as to not put pressure on the threads.
With a pair of Visegrips the pressure is applied to only the sides of the nut, thus making it oblong, making it even tighter against the threads on the shaft.