In article ,
"Bart D. Hull" wrote:

If it's the original stone, pitch them.

I got some Norton stones from MSC and you wouldn't believe
the difference. Smoother running, faster cutting and less
grit being thrown off the wheel. I got a medium and a coarse
stone for my 10" HF grinder.

I may do this. That wheel does throw lots of grit. But I'm suspicious
that the real problem is that the flanges aren't riding square to the
shaft. Perhaps I have both problems.

Joe Gwinn