34:1 Metal Gearmotor 25Dx67L mm HP 12V with 48 CPR Encoder
Product Code: Pololu #4844
This gearmotor consists of a high-power, 12 V brushed DC motor combined with a 34.014:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 1632.67 counts per revolution of the gearbox’s output shaft. The gearmotor is cylindrical, with a diameter just under 25 mm, and the D-shaped output shaft is 4 mm in diameter and extends 12.5 mm from the face plate of the gearbox. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 290 RPM, 300 mA | 8.5 kg⋅cm (120 oz⋅in), 5.6 A |
Specification
Dimensions
| Size: | 25D x 67L mm1 |
|---|---|
| Weight: | 101 g |
| Shaft diameter: | 4 mm |
General specifications
| Gear ratio: | 34.014:1 |
|---|---|
| No-load speed @ 12V: | 290 rpm |
| No-load current @ 12V: | 300 mA |
| Stall current @ 12V: | 5600 mA |
| Stall torque @ 12V: | 120 oz·in |
| No-load speed @ 6V: | 145 rpm2 |
| Stall current @ 6V: | 2800 mA2 |
| Stall torque @ 6V: | 60 oz·in2 |
| Motor type: | 5.6A stall @ 12V (HP 12V) |
| Lead length: | 8 in3 |
| Encoders?: | Y |
Notes:
- Length measurement is from gearbox face plate to back of encoder cap (it does not include the output shaft). See dimension diagram for details.
- This motor will run at 6 V but is intended for operation at 12 V.
- May vary by a few inches.
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