Micro Metal Gearmotor 100:1 (Sale)

This motor has a long (0.365" or 9.27 mm), D-shaped metal output shaft that matches the Pololu wheel 42x19mm and 32x7mm. The brass faceplate has two mounting holes threaded for M1.6 screws (1.6 mm diameter, 0.35 mm thread pitch), or you can use the mounting bracket or extended mounting bracket, which are specifically designed to securely mount the gearmotor while enclosing the exposed gears. We recommend the extended mounting bracket for wheels with recessed hubs, such as the Pololu wheel 42×19 mm.

  • 100:1 Gear ratio
  • 120rpm @ 6V
  • 30mA @ 6V
  • 420mA stall current @ 6V
  • 13 oz inches torque @ 6V

Micro Metal Gearmotor 100:1 (Sale) 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.

  • For anyone who was interested, the force on this unit (at 6V) comes out to about 0.0706 Nm.

    • Member #388783 / about 11 years ago / 1

      ironiridis isn’t 150g.cm equal to 0.0147Nm? (btw i’m using the data of the Datasheet)

  • andygrove / about 12 years ago / 2

    Here's a video of a robot I built this weekend using two of these motors powered by an L293D IC with a 9V battery: http://www.youtube.com/watch?v=6hKtEQSAFKA. These motors worked out really well for this project.

  • pstemari / about 14 years ago / 2

    These are a nice match with the Ardubot board. Use PWM to control the H-bridge, and you can run from about 25% to 100% duty cycle (60 - 255 on the analog write) on a 9V alkaline.
    With the recommended wheels, it runs about at a slow walking speed, maybe 1-2 feet per second and 5-10 seconds to cross the kitchen.

  • CaseyGross / about 11 years ago / 1

    anyone know how loud these motors are while running?

    • Member #332119 / about 11 years ago / 1

      they make a little noise, but not much. maybe about the same as a 120mm computer case fan?

  • davolfman / about 11 years ago / 1

    Time for a dumb question: is this motor reversible? The data sheet seems a little vague on this.

  • Member #401283 / about 11 years ago / 1

    Hi Sparkfun, as we're considering this motor for a production, we had a look to the Kinmore website (http://www.kinmoremotor.com/product_disp.php?productid=7&weblan=e) and we can't find the model listed by Sparkfun. It seems the only 1:100 geared motor is 240rpm instead of 120rpm, and the same for the 1:30 model which is rated 12V and 480rpm. Are the units you're selling here discontinued by Kinmore?

  • Member #388783 / about 11 years ago / 1

    ironiridis isn't 150g.cm equal to 0.0147Nm? (btw i'm using the data of the Datasheet)

  • Greenbean209 / about 12 years ago / 1

    I bought two of these motors, unfortunately I messed one up trying to solder some wires to the leads. Before the leads even got hot enough to stick to the solder, the heat from the leads melted the surrounding black plastic. Maybe I didnt use the right method. I just touched the tip of the iron to the leads, touched the solder to it, before the solder melted the plastic did. Anybody got tips on how to solder wires on properly?

  • Member #169719 / about 13 years ago / 1

    what is the accumulative backlash? and what is the diameter of the motor shaft?

    • Thanks for the question. I am not sure on the backlash, but the diameter of the shaft is 3mm.

  • Bootsie / about 14 years ago / 1

    What is the weight of one of these units?

  • PresidentOfAwesomeness / about 14 years ago / 1

    Are these motors broken in already? If not, how would I do so? Also, is the torque rating taken at stall or spinning with load?

    • Ben9 / about 14 years ago / 2

      The motors do not need to be broken in; the torque rating is the stall torque.

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