This compact, inexpensive, low-current gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. At 4.5 V, it has a free-run speed of 120 RPM and a stall torque of approximately 20 oz-in (however, the built-in safety clutch might start slipping before the stall torque is reached). The splined output shaft has a crest diameter of 2 mm and is offset from but parallel to the motor shaft. Though the product picture shows two gearmotors, this product is for a single motor.
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- dimension diagram: offset 2mm spline version (76k pdf)
- Dimension diagram of the mini plastic gearmotor with offset 2mm spline output.