Mini Metal Gearmotor 24:1

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

Mini Metal Gearmotor 24:1 Product Help and Resources

Core Skill: Robotics

This skill concerns mechanical and robotics knowledge. You may need to know how mechanical parts interact, how motors work, or how to use motor drivers and controllers.

2 Robotics

Skill Level: Rookie - You will be required to know some basics about motors, basic motor drivers and how simple robotic motion can be accomplished.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • Ben9 / about 15 years ago / 2

    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.

  • Member #367480 / about 11 years ago / 1

    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

  • Member #419968 / about 11 years ago / 1

    FingerTech Mecanum Wheels ( fits well in that motor?

  • Skye / about 11 years ago / 1

    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.

    • JerZ / about 11 years ago / 1

      It is a 3mm D-shaft (~2.5mm to the flat), which is 7mm long ;)

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

  • Fourier / about 14 years ago / 1

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

    • Ben9 / about 14 years ago / 1

      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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