> > welds on corners of a MS box, I run the wheel at high
> > speeds. When I need to polish SS run the buff at
> > a much lower speed
>
> You have to watch the tool's cooling too. My drill for example
> gets very hot at slow speed because the fan can't move enough
> air through the motor. If anything has to be done slowly for a
> long time I try to find a way to do it with either the drill press,
> lathe or cordless drill, if it's practical

Plus not all motors have their speed controlled by frequency. For example, a
hand drill and circular saw have brush motors, the speed is controlled by
the design of the motor and load, not the powerline freq. In fact they run
quite happily on rectified and filtered DC.

-Denny

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