On Mon, 06 Dec 2004 16:53:59 -0700, buck wrote:

I see where router speed controls sell in the $25-$50 range and supposedly
they will work with most routers that aren't soft start or already have
variable speed. My question is what is chance of this working with a $40
6 inch non-variable speed bench Home Depot Ryobi grinder.... I would like
to use this grinder to sharpen lathe chisels and I need a slower speed
grinder for this.

They should work with any universal motor as long as the current rating
isn't exceeded. One problem you might encounter with a grinder is the
relatively slow start up speed compared to a router and the possibly
resulting high current draw. I used one with my old PowrKraft RAS which
had a univeral motor when I was using the high speed aux spindle for
shaper cutters.

-Doug