Solarbotics is the sole commercial outlet for these impressive 224:1 gear motors. They are very comparable to a hobby servo for power, at a fraction of the cost!

Mechanical Features

• 7mm output shaft with double-flat outputs
• Secondary output shaft (D) for encoders (not meant for rotational loads)
• Built-in safety ratchet clutch set for 60 in*oz torque (easily modified for full “locked-up” operation)
• Built-in mounting holes
• 55x48x22.7mm (2.17×1.89×0.894″)
• 31.4 grams (1.11oz)
• 3-6VDC nominal operation

3V Features

• 24RPM
• 48.6 in*oz torque
• 40mA free-running current
• 400mA stall current

Based on the original design by Mark Tilden for use in the B.I.O.Bugs & RoboSapien, these motors are the next generation with a variety of improvements such as dual output shafts and a lower current motor.

Check out this quick tutorial for how to modify the GM2 from a torquey slow 224:1 ratio to a speedy 14:1 ratio.

Do you need to mount something to the shaft of the motor? Try the GMW – it’s a very effective platform for a variety uses. Alternatively, you’ll also find that a #2×1/4″ SMS screw will provide a snug fit for your need.

(Motors are sold individually – wheels are not included)