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250:1 Metal Gearmotor 20Dx46L mm 12V CB with Extended Motor Shaft


$22.95 $27.29

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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 12V brushed DC motor with long-life carbon brushes combined with a 250:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 12 V: 57 RPM and 90 mA with no-load, 200 oz-in (14.5 kg-cm) and 1.6 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.


Size: 20D × 46L mm
Weight: 47 g
Shaft diameter: 4 mm

General specifications

Gear ratio: 250:1
No-load speed @ 12V: 57 rpm
No-load current @ 12V: 90 mA
Stall current @ 12V: 1.6 A1
Stall torque @ 12V: 200 oz·in1
No-load speed @ 6V: 29 rpm2
Stall current @ 6V: 0.8 A2
Stall torque @ 6V: 100 oz·in2
Extended motor shaft?: Y
Motor type: 1.6A stall @ 12V CB (carbon brush)


Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. As the motor heats up, as happens as it approaches an actual stall, the stall torque and current decrease.
This motor will run at 6 V but is intended for operation at 12 V.