63:1 Metal Gearmotor 20Dx43L mm 12V CB with Extended Motor Shaft
Product Code: Pololu #3488
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 62.5:1 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 220 RPM, 80 mA | 4.6 kg⋅cm (64 oz⋅in), 1.6 A |
Specifications
Dimensions
| Size: | 20D × 44.7L mm1 |
|---|---|
| Weight: | 45 g |
| Shaft diameter: | 4 mm2 |
General specifications
| Gear ratio: | 62.5:1 |
|---|---|
| No-load speed @ 12V: | 220 rpm |
| No-load current @ 12V: | 0.08 A |
| Stall current @ 12V: | 1.6 A3 |
| Stall torque @ 12V: | 4.6 kg·cm3 |
| Max output power @ 12V: | 2.6 W |
| No-load speed @ 6V: | 110 rpm4 |
| Stall current @ 6V: | 0.8 A4 |
| Stall torque @ 6V: | 2.3 kg·cm4 |
| Extended motor shaft?: | Y |
| Long-life carbon brushes?: | Y |
| Motor type: | 1.6A stall @ 12V CB (carbon brush) |
Performance at maximum efficiency
| Max efficiency @ 12V: | 39 % |
|---|---|
| Speed at max efficiency: | 180 rpm |
| Torque at max efficiency: | 0.80 kg·cm |
| Current at max efficiency: | 0.32 A |
| Output power at max efficiency: | 1.5 W |
Notes:
- Not including output shafts; output shafts add 24 mm to the total length.
- D shaft.
- 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.
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