12V Medium-Power (MP) 25D mm Gearmotors

These 25D mm gearmotors have medium-power (MP), 12 V motors with a stall current of 2.1 A and a typical free-run current of 150 mA. The gearboxes, which are available in a wide range of gear ratios, all have 4 mm diameter, D-shaped output shafts. The following table shows all of the versions available with the MP 12V motor:

Rated
Voltage
Motor Type Stall
Current
@ Rated Voltage
No-Load
Speed
@ Rated Voltage
Approximate
Stall Torque
@ Rated Voltage


With Encoder


Without Encoder
12 V medium-power
(MP)
2.1 A 7800 RPM 2.7 oz-in 1:1 MP 12V w/encoder
1700 RPM 11 oz-in 4.4:1 MP 12V w/encoder 4.4:1 MP 12V
770 RPM 22 oz-in 9.7:1 MP 12V w/encoder 9.7:1 MP 12V
370 RPM 42 oz-in 20.4:1 MP 12V w/encoder 20.4:1 MP 12V
220 RPM 63 oz-in 34:1 MP 12V w/encoder 34:1 MP 12V
160 RPM 85 oz-in 47:1 MP 12V w/encoder 47:1 MP 12V
100 RPM 125 oz-in 75:1 MP 12V w/encoder 75:1 MP 12V
76 RPM 165 oz-in 99:1 MP 12V w/encoder 99:1 MP 12V
43 RPM 250 oz-in 172:1 MP 12V w/encoder 172:1 MP 12V
33 RPM 320 oz-in 227:1 MP 12V w/encoder 227:1 MP 12V

Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. For these gearboxes, the recommended upper limit for instantaneous torque is 200 oz-in (15 kg-cm); we strongly advise keeping applied loads well under this limit. Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes, especially for the versions that use high-power (HP) motors; a general recommendation for brushed DC motor operation is 25% or less of the stall current.

Versions with other motors are also available. You can use the following selection boxes to choose from all of our 25D metal gearmotor versions:

Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…

Products in category “12V Medium-Power (MP) 25D mm Gearmotors”

Pololu item #: 3225
Brand: Pololu
Status: Active and Preferred 
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 4.4:1 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.

Key specs at 12 V: 1700 RPM and 200 mA (max) free-run, 11 oz-in (0.8 kg-cm) and 2.1 A stall.

Pololu item #: 3237
Brand: Pololu
Status: Active and Preferred 
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Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 4.4:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 211.2 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.

Key specs at 12 V: 1700 RPM and 200 mA free-run, 11 oz-in (0.8 kg-cm) and 2.1 A stall.

Pololu item #: 3226
Brand: Pololu
Status: Active and Preferred 
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 9.68:1 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.

Key specs at 12 V: 770 RPM and 200 mA (max) free-run, 22 oz-in (1.6 kg-cm) and 2.1 A stall.

Pololu item #: 3238
Brand: Pololu
Status: Active and Preferred 
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Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 9.68:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 464.64 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.

Key specs at 12 V: 770 RPM and 200 mA free-run, 22 oz-in (1.6 kg-cm) and 2.1 A stall.

Pololu item #: 3227
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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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.

Key specs at 12 V: 370 RPM and 200 mA (max) free-run, 42 oz-in (3 kg-cm) and 2.1 A stall.

Pololu item #: 3239
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-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.

Key specs at 12 V: 370 RPM and 200 mA free-run, 42 oz-in (3 kg-cm) and 2.1 A stall.

Pololu item #: 3228
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 34.014:1 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.

Key specs at 12 V: 220 RPM and 200 mA (max) free-run, 63 oz-in (4.5 kg-cm) and 2.1 A stall.

Pololu item #: 3240
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-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.

Key specs at 12 V: 220 RPM and 200 mA free-run, 63 oz-in (4.5 kg-cm) and 2.1 A stall.

Pololu item #: 3229
Brand: Pololu
Status: Active and Preferred 
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 46.85:1 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.

Key specs at 12 V: 160 RPM and 200 mA (max) free-run, 85 oz-in (6 kg-cm) and 2.1 A stall.

Pololu item #: 3241
Brand: Pololu
Status: Active and Preferred 
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 46.85:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2248.86 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.

Key specs at 12 V: 160 RPM and 200 mA free-run, 85 oz-in (6 kg-cm) and 2.1 A stall.

Pololu item #: 3230
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 74.83:1 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.

Key specs at 12 V: 100 RPM and 200 mA (max) free-run, 125 oz-in (9 kg-cm) and 2.1 A stall.

Pololu item #: 3242
Brand: Pololu
Status: Active and Preferred 
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 74.83:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 3591.84 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.

Key specs at 12 V: 100 RPM and 200 mA free-run, 125 oz-in (9 kg-cm) and 2.1 A stall.

Pololu item #: 3231
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 98.78:1 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.

Key specs at 12 V: 76 RPM and 200 mA (max) free-run, 165 oz-in (12 kg-cm) and 2.1 A stall.

Pololu item #: 3243
Brand: Pololu
Status: Active and Preferred 
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 98.78:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 4741.44 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.

Key specs at 12 V: 76 RPM and 200 mA free-run, 165 oz-in (12 kg-cm) and 2.1 A stall.

Pololu item #: 3232
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 171.79:1 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.

Key specs at 12 V: 43 RPM and 200 mA (max) free-run, 250 oz-in (18 kg-cm) and 2.1 A stall.

Pololu item #: 3244
Brand: Pololu
Status: Active and Preferred 
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 171.79:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 8245.92 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.

Key specs at 12 V: 43 RPM and 200 mA free-run, 250 oz-in (18 kg-cm) and 2.1 A stall.

Pololu item #: 3233
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 226.76:1 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.

Key specs at 12 V: 33 RPM and 200 mA (max) free-run, 320 oz-in (23 kg-cm) and 2.1 A stall.

Pololu item #: 3245
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 226.76:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 10,884.47 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.

Key specs at 12 V: 33 RPM and 200 mA free-run, 320 oz-in (23 kg-cm) and 2.1 A stall.

Pololu item #: 3236
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
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This is the motor and encoder portion of our medium-power (HP), 12V 25D mm metal gearmotors with 48 CPR encoders. It does not include a gearbox, but the pinion gear on the output shaft works with all of our 25D mm gearmotor gearboxes, so this can be used as a replacement motor or encoder for those gearboxes.

Key specs at 12 V: 7800 RPM and 50 mA free-run, 2.7 oz-in (0.2 kg-cm) and 2.1 A stall.

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