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

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

by Pololu
SKU CED-P3494
Save 16% Save 16%
$27.29
$27.29 - $27.29
$27.29
$22.95
$22.95 - $22.95
$22.95

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.

Dimensions

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)

Notes:

1
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.
2
This motor will run at 6 V but is intended for operation at 12 V.

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