Retired Product

This product has been retired from our catalog and is no longer for sale. This page is made available for those looking for datasheets and the simply curious.

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Description: Replacement:ROB-12007. Our new gearmotors have a gear ratio of 26:1 and 438 RPM, go check them out! This page is for reference only.

This motor has a 0.275" (7 mm) D-shaped metal output shaft that matches the Pololu wheel 42x19mm and 32x7mm (listed below). The face plate has two mounting holes threaded for M2 screws.

These motors are intended for use at 6V. 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.


  • 24:1 gear ratio
  • 415rpm @ 6V
  • 50mA @ 6V
  • 5 oz inches torque @ 6V


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Customer Comments

  • There is a mistake with the free-run speed listed in the product description. This motor has a free-run speed of 410 RPM at 6V, not 140 RPM.

  • For anyone who was interested, the torque on this unit (at 6V) comes out to about 0.0282 Nm.

  • I’m having a problem with one of mine. I got 2, and 1 makes a weird noise when it does work, and I have to let it sit for about 5 minutes after powering it for 10 seconds or it will not work. Any help? Also: i was using a 9v battery

  • FingerTech Mecanum Wheels ( fits well in that motor?

  • I think the 7mm dia output shaft is also in error. I think the bronze bushing is 7mm and the shaft is 3mm from the datasheet.

  • please tell me what type of screws i need for this like 2-56 thank you

  • The difference noted by Ben is pretty significant; does the manufacture not produce a datasheet?

    • You can find the correct specs on Pololu’s website:
      It looks like Sparkfun just copied the product page from the 100:1 mini metal gearmotor and forgot to change the free-run speed specification (or maybe they accidentally swapped the 4 and the 1).

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