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: 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


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Customer Comments

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

  • 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: These motors worked out really well for this project.

  • 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.

  • anyone know how loud these motors are while running?

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

  • Hi Sparkfun, as we’re considering this motor for a production, we had a look to the Kinmore website ( 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?

  • ironiridis isn’t equal to 0.0147Nm? (btw i’m using the data of the Datasheet)

  • 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?

  • 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.

  • What is the weight of one of these units?

  • 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?

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

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