MOTOR PIVOT SUPPORT. Identical replacment for original equipment Motor Pivot Support. Supports motor and allows it to swivel. Fits into the top hole of all recent models of Mastercarver® dial speed controls. Heavy duty, all metal construction. Requires 797139 (or 798110) Mastercarver® dial speed control sold seperately. Caution: Properly, secure motor and dial control base screws before use.
797138 MOTOR PIVOT SUPPORT
797138 MOTOR PIVOT SUPPORT

Will this fit onto a master carver heavy duty pro-flex.shaft? 1/2 horsepower, 30,000 rpm max, reversible, 110-120 volts, 50/60 HZ, AC/DC, 350 Watts max. It has forward and reverse. It measures about 79mm diameter.
Yes, this will fit your machine.