This quality bench polishing motor features a high torque variable speed motor (3,000–7,000rpm). Accepts wheels, buffs and polishers up to 4" in diameter; accessories should be rated for at least 7,500rpm.
• Motor: 1/6hp
• Shaft size: 5/16"
Power : 110 volts; 3.4 amps
Use with 3" Bristle Disks for maximum polishing efficiency on metal clay!
Here's a quick video to explain how to set it up https://youtu.be/ta5wJexS9-s