Doug, as I said, when I am sanding on my Robust, the motor temperature, tested by putting my hand on it, is much cooler than when I am turning. Not sure what the motor is on the Vicmark, but it runs very slow as well. Not sure if it is 3 phase or not. With my 3520A, my motor never over heated or tripped the circuit breaker or the phase converter. I would think that with the thousands of bowls I have turned that if there was going to be an issue, I would have had it by now.