"Mark" wrote in message
...
snip----
What is the best way to get a wheel to go?

You mean blow up??

Drop a chisel between a badly adjusted tool rest and the wheel. Sudden
stoppage will usually do it.

Mark

The stop isn't a problem. The damage done to a wheel when the wedging
action occurs certainly can be. I recall an incident many years ago in
which we routinely ground a short piece of 3-1/2" diameter steel, three
inches long, in a centerless (Cincinnati #2). Because the size was beyond
the rated capacity of the grinder, even using our lowest height blade, the
part rode too far above center, yielding an operation running on the edge
where one shouldn't be running. The parts would traverse the blade with a
rumbling sound, one that you knew was caused by the part starting to jump
up, but always falling back in place, gradually running through the grinder.
One fateful night that was not the case. I was, fortunately, not the guy
running the job when it happened, it was on the opposite shift. One of
the parts finally made the leap out of the machine, coming back down
sideways. The grinding wheel, 6" wide and 20" diameter, driven with a 15
horse motor, was slammed to an immediate stop, wedging between the grinding
and regulating wheel on top of the carbide blade, which was shattered.
Messelman, the operator, was very pale, I was told. Go figure!

The grinding wheel had a divot removed, but after dressing to get down to a
full wheel the wheel was used again. Stopping them fast doesn't do any
damage. Apparently when they're well made, neither does wedging them!
g

Harold