Pololu Metal Gearmotors » 25D Metal Gearmotors » 12V Medium-Power (MP) 25D mm Gearmotors »
20.4:1 Metal Gearmotor 25Dx50L mm MP 12V
This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 20.4:1 metal spur gearbox. 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 with an integrated encoder.
|voltage||no-load performance||stall extrapolation|
|12 V||380 RPM, 80 mA||3.2 kg⋅cm (44 oz⋅in), 1.8 A|
Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…
Compare all products in 12V Medium-Power (MP) 25D mm Gearmotors.
|Description||Specs (19)||Pictures (10)||Resources (3)||FAQs (1)||On the blog (0)|
|Size:||25D x 50L mm1|
|Shaft diameter:||4 mm2|
|No-load speed @ 12V:||380 rpm3|
|No-load current @ 12V:||0.080 A4|
|Stall current @ 12V:||1.8 A5|
|Stall torque @ 12V:||3.2 kg·cm5|
|Max output power @ 12V:||3.1 W|
|No-load speed @ 6V:||190 rpm6|
|Stall current @ 6V:||0.90 A6|
|Stall torque @ 6V:||1.6 kg·cm6|
|Motor type:||12V, 1.8A stall (MP 12V)|
Performance at maximum efficiency
|Max efficiency @ 12V:||43 %|
|Speed at max efficiency:||330 rpm|
|Torque at max efficiency:||0.43 kg·cm|
|Current at max efficiency:||0.28 A|
|Output power at max efficiency:||1.5 W|
- Length measurement is from gearbox face plate to back of motor (it does not include the output shaft or motor terminals). See dimension diagram for details.
- D shaft.
- Typical; ±20%.
- Typical, ±50%; no-load current depends on internal friction, which is affected by many factors, including ambient temperature and duration of motor operation.
- 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.