On 8/19/2011 11:57, Harold & Susan Vordos wrote:
Something to consider. Motors on precision grinders are not of the
common variety. They are generally precision balanced, and should not be
replaced by single phase motors, even if they are balanced. The
pulsation of the single phase motor will generally manifest itself in
the surface finish. If you can't provide three phase power, I'd suggest
you not get involved unless absolutely necessary. You're bound to be
disappointed.

One can easily get 3 phase power to motor from VFD so
that is not a problem nowadays. Just a VFD that takes
1 phase input and outputs 3 phase to motor. Ebay..

Kristian Ukkonen.