Pololu Metal DC Gearmotors » Micro Metal Gearmotors » 12V High-Power Carbon Brush (HPCB) Micro Metal Gearmotors »
50:1 Micro Metal Gearmotor HPCB 12V with 12 CPR Encoder, Back Connector
This is a miniature brushed DC metal gearmotor with a gearbox cross section of 10×12 mm and a 9 mm long, 3 mm diameter D-shaped gearbox output shaft. Cables sold separately.
| motor/brush type | gearbox | encoder | |
|---|---|---|---|
| HPCB 12V: high-power 12V with carbon brushes | 51.45:1 with brass plates | 12 CPR incremental quadrature with back connector | |
| voltage | no-load performance | stall extrapolation* | 
|---|---|---|
| 12 V | 650 RPM, 80 mA | 0.67 kg⋅cm (9.3 oz⋅in), 0.75 A | 
| * Note: Stall torque and stall current specifications are theoretical values; stalls could damage the motor or gearbox. | ||
Alternatives available with variations in these parameter(s): gear ratio motor type encoder Select variant…
Compare all products in 12V High-Power Carbon Brush (HPCB) Micro Metal Gearmotors.
| Description | Specs (20) | Pictures (26) | Resources (3) | FAQs (2) | On the blog (0) | Distributors (24) | 
|---|
Dimensions
| Size: | 10 × 12 × 32 mm1 | 
|---|---|
| Weight: | 11 g | 
| Shaft diameter: | 3 mm2 | 
General specifications
| Gear ratio: | 51.45:1 | 
|---|---|
| No-load speed @ 12V: | 650 rpm3 | 
| No-load current @ 12V: | 0.08 A4 | 
| Stall current @ 12V: | 0.75 A | 
| Stall torque @ 12V: | 0.67 kg·cm | 
| Max output power @ 12V: | 1.1 W | 
| No-load speed @ 6V: | 325 rpm5 | 
| Stall current @ 6V: | 0.38 A5 | 
| Stall torque @ 6V: | 0.34 kg·cm5 | 
| Encoder: | 12 CPR encoder with back connector | 
| Long-life carbon brushes?: | Y | 
| Motor type: | 0.75A stall @ 12V (HPCB 12V - carbon brush) | 
Performance at maximum efficiency
| Max efficiency @ 12V: | 31 % | 
|---|---|
| Speed at max efficiency: | 500 rpm | 
| Torque at max efficiency: | 0.15 kg·cm | 
| Current at max efficiency: | 0.22 A | 
| Output power at max efficiency: | 0.79 W | 
Notes:
- 1
 - Output shaft adds 10 mm to the 32 mm length, and the encoder extends past the 10 × 12 gearbox cross section on three of the four sides. See dimension diagram for details.
 - 2
 - D shaft.
 - 3
 - Typical; ±20%.
 - 4
 - Typical, ±50%; no-load current depends on internal friction, which is affected by many factors, including ambient temperature and duration of motor operation.
 - 5
 - This motor will run at 6 V but is intended for operation at 12 V.
 



































