Hi there.
I don't know what a MC-60 motor is or what kind of spec it has.
But it is possible to control heavy loads with PWM in a transistor circuit.
Example for DC here: http://tutorial.cytr...modulation-pwm/
If you need AC see the following link: http://hackaday.com/...pwm-connection/
(or search google for PWM AC motor control)
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