100:1 Mini Metal Gearmotor

100:1 Mini Metal Gearmotor
Pololu item #: 990 0 in stock

This product has been discontinued.

This brushed DC metal gearmotor is a compact (1.26" x 0.63" x 0.63") motor with an enclosed 100:1 metal gearbox. These units have a 0.275"-long, 3 mm-diameter D-shaped output shaft.

Key specs at 6 V: 140 RPM and 90 mA free-run, 15 oz-in (1.0 kg-cm) and 0.8 A stall.

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Discontinuation Notice: Our mini metal gearmotors have been replaced by slightly more powerful versions with similar dimensions: 35:1 metal gearmotor 15.5Dx30L mm and 115:1 metal gearmotor 15.5Dx30L mm.

Mini gearmotor with bracket and hub.

Gearmotor Dimensions:

This brushed DC motor has a 0.275"-long, 3 mm-diameter D-shaped metal output shaft that matches our assortment of Pololu wheels and the Solarbotics RW2 rubber wheel. Alternatively, the hub in the picture to the right can be used to mount custom wheels and mechanisms to the gearmotor’s output shaft.

The face plate has two mounting holes threaded for M2 screws. You can use our custom-designed mini metal gearmotor bracket (pictured to the right) to mount the gearmotor to your project via these mounting holes and the screws that come with the bracket.

The dimension L in the diagram below is 13 mm for the 24:1 mini metal gearmotor and 14.3 mm for the 100:1 mini metal gearmotor.

100:1 and 24:1 mini metal gearmotor dimensions (units in mm).

Pololu wheel 32×7mm on a micro metal gearmotor.
Pololu wheel 42×19mm with micro metal gearmotor.
Black Pololu 90×10mm wheel on a Pololu micro metal gearmotor.

These 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.

Some of the Pololu metal gearmotors.

Selecting the Right Gearmotor

We offer a wide selection of metal gearmotors that offer different combinations of speed and torque. Our metal gearmotor comparison table can help you find the motor that best meets your project’s requirements.

Some of the Pololu metal gearmotors.

People often buy this product together with:

Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack) Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)
100:1 Micro Metal Gearmotor 100:1 Micro Metal Gearmotor
Pololu Wheel 42x19mm Pair Pololu Wheel 42x19mm Pair