20.4:1 Metal Gearmotor 25Dx50L mm MP 12V

Product Code: Pololu #3227

 20.4:1 Metal Gearmotor 25Dx50L mm MP 12V
 20.4:1 Metal Gearmotor 25Dx50L mm MP 12V
 20.4:1 Metal Gearmotor 25Dx50L mm MP 12V
 20.4:1 Metal Gearmotor 25Dx50L mm MP 12V

GST inclusive


Availability: Backorder

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These cylindrical brushed DC gearmotors are available in a wide range of gear ratios and with five different motors (two power levels of 6 V motors and three power levels of 12 V motors). The gearmotors all have the same 25 mm diameter case and 4 mm diameter gearbox output shaft, so it is generally easy to swap one version for another if your design requirements change (though the length of the gearbox tends to increase with the gear ratio). Each version is also optionally available with an integrated 48 CPR quadrature encoder. Please see the 25D metal gearmotor comparison table for detailed specifications of all our 25D metal gearmotors.



Size: 25D x 50L mm1
Weight: 85 g
Shaft diameter: 4 mm

General specifications

Gear ratio: 20.4:1
No-load speed @ 12V: 370 rpm
No-load current @ 12V: 200 mA2
Stall current @ 12V: 2100 mA
Stall torque @ 12V: 42 oz·in
No-load speed @ 6V: 185 rpm3
Stall current @ 6V: 1050 mA3
Stall torque @ 6V: 21 oz·in3
Motor type: 2.1A stall @ 12V (MP 12V)
Encoders?: N


  • 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.
  • Maximum.
  • This motor will run at 6 V but is intended for operation at 12 V.
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