Micro Metal Gearmotor Details

Overview

These tiny, high-quality motors are intended for use at 6 V. In general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range. Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. All of the micro metal gearmotors have the same physical dimensions, but they come in a wide range of gear ratios—from 5:1 up to 298:1—and let you choose between two different motors: high-power (HP) and standard. This means you choose the version that has the ideal blend of speed, torque, and current-draw for your particular application.

Gearmotor Dimensions

This motor has a long (0.365" or 9.27 mm), D-shaped metal output shaft, and the brass faceplate has two mounting holes threaded for M1.6 screws (1.6 mm diameter, 0.35 mm thread pitch). It weighs approximately 0.35 oz (10 g).

Motor Accessories

• Wheels and Hubs: The micro metal gearmotor’s output shaft matches the Pololu wheel 32×7mm, Pololu wheel 42×19mm, and Solarbotics RW2 rubber wheel. You can also use the Pololu universal mounting hub to mount custom wheels and mechanism to the micro metal gearmotor’s output shaft.

	Pololu wheel 32×7mm on a micro metal gearmotor.	Pololu wheel 42×19mm with micro metal gearmotor.	A pair of Pololu universal aluminum mounting hubs for 3 mm shaft.

• Mounting Brackets: Pololu's mounting bracket (also available in white) and extended mounting bracket are specifically designed to securely mount the gearmotor while enclosing the exposed gears. We recommend the extended mounting bracket for wheels with recessed hubs, such as the Pololu wheel 42×19mm.

	Black micro metal gearmotor mounting bracket pair with included screws and nuts.	White micro metal gearmotor mounting bracket pair with included screws and nuts.	Pololu micro metal gearmotor bracket extended with micro metal gearmotor.

• Quadrature Encoder: We offer a quadrature encoder for this motor that works with our extended bracket and 42×19mm wheel and provides feedback about wheel rotation (direction and speed). The encoder can be purchased as an individual unit or as part of an encoder set that includes two encoders, a pair of extended brackets, and a pair of 42×19mm wheels—just pick the particular micro metal gearmotor that best suits your application and you have a solution for closed-loop motor control.

	Encoder for Pololu wheel 42×19mm with wheel, motor, and bracket.	Side view of the encoder for Pololu wheel 42×19mm, mounted to a bracket.	Oscilloscope capture of encoder outputs with the wheel spinning at 630 RPM.

• Motor Controllers: We have a number of motor controllers that make it easy to drive these micro metal gearmotors, including our qik 2s9v1 dual serial motor controller and our programmable Baby Orangutan and Orangutan SV-328 robot controllers. The inexpensive qik 2s9v1 allows variable speed and direction control of two small, brushed DC motors using a simple serial interface; the Orangutans combine a programmable Atmel AVR microcontroller and dual motor driver all in a single package and make interfacing with the motor drivers simple when you use our Pololu AVR library. All of the above controllers use the TB6612FNG dual motor driver, for which we also offer a simple carrier board.

	Pololu qik 2s9v1 dual serial motor controller.	Baby Orangutan B-328.	TB6612FNG dual motor driver carrier.

Pololu metal gearmotors arranged by size from left to right: micro, 100:1 and 24:1 mini, 35:1 mini, and 25:1 20Dx44L mm.