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This MM28 high-torque 3V DC motor is a compact and reliable drive solution for robotics, mechanisms, and small electronic projects. Designed for strong output in a small footprint, it delivers high rotational speed and dependable torque, making it ideal for driving wheels, gears, and light weight mechanical assemblies. Its wide operating voltage range of 1.5V to 6V allows flexible use across battery-powered builds and classroom STEM activities.

With a typical speed of 7930 RPM and a current draw of 760mA, this motor provides responsive performance suitable for hobby robotics, model-making,and prototyping. The 2mm axle and compact 24mm diameter housing make it easy to integrate into custom mounts or motor brackets. Supplied as a packof 10, it’s perfect for workshops, kits, and bulk educational use.

Features:

  • High-torque 3V DC motor for robotics and mechanical projects.
  • Operating voltage range: 1.5V to 6.0V.
  • Typical speed: 7930 RPM.
  • Typical current: 760mA.
  • 2mm axle diameter for easy coupling.
  • Compact 24mm diameter motor body.

Contents:

  • 10 × MM28 High Torque 3V DC Motors

Dimensions:

  • Motor length: 30.5mm
  • Motor diameter: 24mm
  • Shaft length: 10mm
  • Shaft diameter: 2mm

Resources:

Documents & downloads

Technical Information

AttributeValue
Operating voltage 1.5V to 6.0V
Axle diameter 2mm
Typical speed 7930 RPM
Typical current 760mA
Dimensions 30.5mm, dia 24mm, shaft 10mm dia 2mm
Mountable using x2 M3 bolts.

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Questions and answers

    We are running a project making model wind turbines and need a 1.5-6V motor but preferably with a spindle that has a notch or similar to prevent the kids pushing the blades on too far. Can you recommend? thank you
  1. 0 votes
    Q We are running a project making model wind turbines and need a 1.5-6V motor but preferably with a...... Read more
    Asked by davya2 on March 12, 2026 11:06 am
    Answered by the admin

    Hello,

    We stock a range of motors with varying voltage requirements although none of the motor spindles have a notch or similar. However, it shouldn't be possible to push the fan blades on too far if you are using something like our 90mm Blue Three Blade Propeller or 115mm Black Three Blade Propeller.

    A possible motor option could be 2507, Motor (High Torque), pack of 10 which has a voltage range of 1.5V-6V. I have listed some of the additional options below also which have slightly different voltage ranges.

    Additional Motor options:

    2510, Motors (Low Torque), pack of 10 - 1.5-3V

    2501, Motor (Medium Torque), pack of 10 - 1.5-4.5V

    2543, Miniature Low Torque Flat DC Motor - 1.5-4.5V

  2. Hello,I'd like to run a class project turning a DC motor into a generator to power an LED. Initially it will be hand-cranked, with a large cranked pulley driving a tiny pulley on the motor to step up the speed. Which of your DC motors would be most suitable for this application? As always, the lower end of the price range is better.Thanks,Doug
  3. 0 votes
    Q Hello,I'd like to run a class project turning a DC motor into a generator to power an LED. Initia...... Read more
    Asked by Anonymous on March 12, 2020 12:00 am
    Answered by the admin Hi Doug,

    Thank you for your question it would be best to use one of our geared motors on the link below but even then it is quite difficult to generate the required voltage and current to light the LED.

    https://www.kitronik.co.uk/2586-n20-series-micro-metal-gearmotor-2981.html

    Best Regards

    Cullen
  4. Where do the m3 bolts go in order to mount the motor? Can't quite tell from the picture. Thanks
  5. 0 votes
    Q Where do the m3 bolts go in order to mount the motor? Can't quite tell from the picture. Thanks
    Asked by Anonymous on April 30, 2018 12:00 am
    Answered by the admin Hi Tony, The motor can be fixed in place by the holes on the front of the motor. However it does appear we reference the incorrect size mounting and it may be a M2.5 bolt. We on working on getting this corrected with the correct size. Another alternative for mounting is a mounting clip, such as this https://www.kitronik.co.uk/2505-plastic-motor-mounting-clips-pack-of-10.html
  6. Is this motor suitable to drive a small bbq roasting spit powered by 2x1.5 batteries.? Thank you, Eddie.
  7. 0 votes
    Q Is this motor suitable to drive a small bbq roasting spit powered by 2x1.5 batteries.? Thank you,...... Read more
    Asked by Anonymous on April 5, 2011 12:00 am
    Answered by the admin I believe that the motor should be ok. I believe you will have to use some form of gearing to slow the rotation as I doubt you will want your spit to rotate at 7930 RPM which the motor does under no load.
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