This amazing little motor contains a 25:1 planetary gear reduction on top of a pager motor, all under 6mm diameter, with an overall length of 20mm, which is smaller than many pager motors!

The output shaft is grooved for a 1.5mm radius belt, but we've easily modified it to mate with our 10mm RW wheel (drilled out to 0.086"). They weigh only 1.2grams!

It's designed for 3V nominal operation, giving 1200RPM drawing 100mA. At stall, you get over 0.28in.oz or 20gm.cm of torque!