Pololu 639 - Solarbotics GM13a 150:1 Mini Metal Gear Motor

These miniature brushed DC metal gear motors have 3 mm diameter output shafts that mate fairly well with any 1/8-inch hole output device, including the Solarbotics RW2 high-traction rubber wheels. Alternatively, you can use the Pololu universal mounting hub to mount custom wheels and mechanism to the micro metal gearmotor’s output shaft.

The brass faceplates have two mounting holes threaded for 1.7 (dia) x 0.35 (mm/thd) x 4mm long screws (M1.7 × 4 mm), or you can use our mounting bracket, which is specifically designed to securely mount the gearmotor while enclosing the exposed gears.

These small motors come in a variety of gear ratios, have a compact size (1.14" x 0.39" x 0.47"), and weigh only 0.29 oz, making them a great choice for small robot designs — and controlling these low-current motors is a snap with our qik 2s9v1 dual serial motor controller.

Solarbotics mini metal gearmotor dimensions (in mm).

You can download a pdf version of this drawing with imperial dimensions (119k pdf) or metric dimensions (118k pdf).

Specs for the Solarbotics mini metal gearmotors running at 6 V:

Specs for the similar, less expensive Pololu metal gearmotors running at 6 V:

Note: These gearmotors do not come with mounting hardware, instructions, or packaging. The brass faceplate has two mounting holes threaded for 1.7 (dia) x 0.35 (mm/thd) x 4mm long screws (M1.7 × 4 mm), and our micro metal gearmotor bracket (sold separately) gives you even more mounting options.

People often buy this product together with:

Solarbotics GM14a 298:1 Mini Metal Gear Motor

Solarbotics GM12a 100:1 Mini Metal Gear Motor

Solarbotics RW2 Wheel (external set screw)