120:1 Mini Plastic Gearmotor, 90° 2mm Spline Output

120:1 Mini Plastic Gearmotor, 90° 2mm Spline Output
Pololu item #: 1123 500 in stock

Price break Unit price (US$)
1 5.49
10 4.95
50 4.67

backorders allowed

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 perpendicular to the motor shaft. Though the product picture shows two gearmotors, this product is for a single motor.

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Size: 54.5 x 20 x 13.8 mm1
Weight: 19 g
Shaft diameter: 2 mm2

General specifications

Shaft type: 90° 2mm spline
Typical operating voltage: 4.5 V
Gear ratio: 120:1
Free-run speed @ 4.5V: 120 rpm
Free-run current @ 4.5V: 80 mA
Stall current @ 4.5V: 800 mA
Stall torque @ 4.5V: 20 oz·in3
Extended motor shaft?: N


See drawing for detailed dimensions.
Measurement is diameter of spline crest.
Note: the gearbox's built-in clutch might start slipping at a lower torque.