75:1 Micro Metal Gearmotor HP View larger

75:1 Micro Metal Gearmotor HP

This gearmotor is a miniature (0.94" x 0.39" x 0.47"), high-power brushed DC motor with 75:1 metal gearbox, similar to Sanyo’s popular 12 mm gearmotors. These units have a 0.365"-long, 3 mm-diameter D-shaped output shaft.

Key specs at 6 V: 400 RPM and 70 mA free-run, 22 oz-in (1.6 kg-cm) and 1.6 A stall.

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14.01 JD


These tiny brushed DC gearmotors are intended for use at 6 V, though 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 (rotation can start at voltages as low as 0.5 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. The micro metal gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and offer a choice between three different motors: high-power (HP), medium-power (MP), and standard. With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change. Please see the micro metal gearmotor comparison table for detailed specifications of all our micro metal gearmotors. This dynamically-sortable table can help you find the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application.

Gearmotor Dimensions


Micro metal gearmotor dimensions (units in mm).


The gearbox has a long (0.365" or 9.27 mm), 3 mm-diameter 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). The gearmotor weighs approximately 0.35 oz (10 g). Versions with the extended motor shaft have a 1mm diameter round shaft that protrudes 4.5 mm from the rear of the motor, between the two motor terminals; this is not pictured in the above dimension diagram.


  • Gear ratio:75:1
  • Free-run speed @ 6V:400 rpm
  • Free-run current @ 6V:70 mA
  • Stall current @ 6V:1600 mA
  • Stall torque @ 6V:22 oz·in
  • Extended motor shaft?:N
  • Size:24 x 10 x 12 mm
  • Weight:0.34 oz
  • Shaft diameter:3 mm


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