250:1 Metal Gearmotor 20Dx46L mm 12V CB with Extended Motor Shaft
by Pololu
SKU CED-P3494
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.