Rock Tumbler Motors

These motors only fit the rock tumblers listed below. If you need a motor for another tumbler or some other project, visit Grainger.com.

We sell replacement motors for the most popular tumblers manufactured by Thumler's Tumblers and Lot-O-Tumbler. They are easy to replace with no special tools required. If you have a screwdriver, small wrench, wire cutters, and a knife, you can install any of these motors. Please do not purchase these motors for other types of tumblers - get information for other tumblers here.

Thumler's A-R Model Tumblers Motor Pulley

Thumler's Model B Tumbler Motor Pulley

Thumler's Motor Mounting Nuts

Two keps nuts (nuts with attached, free spinning, star-shaped lock washers) are used to keep the motor in place. For Thumler's Model MP-1, Model T, and Model T2: The nuts screw onto the two motor-mounting bolts where they extend through the motor housing, one on each side of the opening where the motor's drive shaft protrudes. For Thumler's Models A-R1, A-R2, A-R6, A-R12, and Model B: The nuts screw onto the two motor-mounting bolts where they extend through the motor-mounting brackets.

Thumler's MP-1 Motor

This is the small light-duty motor that fits Thumler's MP-1 Tumblers. It comes with the motor, pulley, and power cord.

Thumler's A-R Model Tumbler Motor

This thermally protected motor comes with the pulley and fits all Thumlers AR series tumblers and will automatically shut off under excessive load. This motor fits the following tumblers: A-R1, A-R2, A-R6, and A-R12. This motor does not fit other tumblers.

Thumler's Model B Tumbler Motor - Low Speed (Rock Tumbling)

This is the low speed (1550 rpm) replacement motor designed for rock tumbling in Thumlers Model B rock tumbler and includes the pulley. It is a thermally protected motor that will shut off automatically if it gets too hot. Easy to replace, just remove the belt, mounting screws and replace. This motor does not fit other tumblers.

Thumlers Model B high speed tumbler motor

Thumler's Model B Tumbler Motor - High Speed (Brass Tumbling)

We don't know when this motor will be available.More Information

This is the high speed (3000 rpm) replacement motor and pulley are designed for brass tumbling in Thumlers Model B tumbler. It is a thermally protected motor that will shut off automatically if it gets to hot. Easy to replace, just remove the belt, mounting screws and replace. This motor does not fit other tumblers.

UV-10 Mini Bowl Tumbler Motor

We don't know when this motor will be available.More Information

This is a replacement motor for Thumler's UV-10 Mini Bowl vibratory rock tumbler and includes the counterweight. The motor is thermally protected and has a counter weight on the shaft behind the fan to create the vibrations during operation.

Thumler's UV-10 (Industrial) Tumbler Motor

This replacement motor includes the counterweight and fits Thumlers industrial UV-10 vibratory rock tumbler. It is thermally protected and will shut off automatically if it gets too hot. This motor does not fit other tumblers.

Thumler's UV-18 Motors and Mounting Brackets

Thumler's factory customer service department is the only place to buy motors and motor-mounting brackets for the UV-18 tumbler. They are at Tru-Square Metal Products. You can find ordering information here.

Lot-O-Tumbler Motor

We don't know when this motor will be available.

A replacement motor for the Lot-O-Tumbler Single or Twin. The motor fans that contain the counterweight are NOT included. This motor does not fit other tumblers.