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20.4:1 Metal Gearmotor 25Dx65L mm HP 12V with 48 CPR Encoder
This gearmotor consists of a high-power, 12 V brushed DC motor combined with a 20.4:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 979.62 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 | 500 RPM, 300 mA | 7.4 kg⋅cm (100 oz⋅in), 5.0 A |
Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…
Compare all products in 12V High-Power (HP) 25D mm Gearmotors.
| Description | Specs (20) | Pictures (11) | Resources (4) | FAQs (3) | On the blog (0) |
|---|
Dimensions
| Size: | 25D x 65L mm1 |
|---|---|
| Weight: | 98 g |
| Shaft diameter: | 4 mm2 |
General specifications
| Gear ratio: | 20.4:1 |
|---|---|
| No-load speed @ 12V: | 500 rpm3 |
| No-load current @ 12V: | 0.30 A4 |
| Stall current @ 12V: | 5.0 A5 |
| Stall torque @ 12V: | 7.4 kg·cm5 |
| Max output power @ 12V: | 9.4 W |
| No-load speed @ 6V: | 250 rpm6 |
| Stall current @ 6V: | 2.5 A6 |
| Stall torque @ 6V: | 3.7 kg·cm6 |
| Motor type: | 12V, 5.0A stall (HP 12V) |
Performance at maximum efficiency
| Max efficiency @ 12V: | 46 % |
|---|---|
| Speed at max efficiency: | 420 rpm |
| Torque at max efficiency: | 1.1 kg·cm |
| Current at max efficiency: | 0.88 A |
| Output power at max efficiency: | 4.8 W |
General specifications
| Lead length: | 8 in7 |
|---|---|
| Encoders?: | Y |
Notes:
- 1
- Length measurement is from gearbox face plate to back of encoder cap (it does not include the output shaft). 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
- 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.
- 6
- This motor will run at 6 V but is intended for operation at 12 V.
- 7
- May vary by a few inches.
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