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

These 25D mm gearmotors have medium-power (MP), 12 V motors with a stall current of 1.8 A and a typical free-run current of 100 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:

Motor
Type
Rated
Voltage
Stall
Current
No-Load
Current
Gear Ratio No-Load Speed
(RPM)
Extrapolated
Stall Torque
Max Power
(W)


Without Encoder


With Encoder
(kg ⋅ cm) (oz ⋅ in)
Medium-Power
(MP) 12 V
12 V 1.8 A 80 mA
w/o
encoder


100 mA
with
encoder
1:1 (no gearbox) 8200 0.17 2.4 3.5 item #4860
4.4:1 1800 0.71 10 3.2 item #3225 item #4861
9.7:1 800 1.7 24 3.4 item #3226 item #4862
20.4:1 380 3.2 44 3.1 item #3227 item #4863
34:1 230 4.7 65 2.8 item #3228 item #4864
47:1 170 6.4 89 2.8 item #3229 item #4865
75:1 100 8.5 120 2.3 item #3230 item #4866
99:1 79 11 150 2.3 item #3231 item #4867
172:1 46 18 250 2.1 item #3232 item #4868
227:1 35 24 330 item #3233 item #4869

Note: The listed stall torques and currents are theoretical extrapolations; units will typically stall well before these points as the motors heat up. Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. The recommended upper limit for continuously applied loads is 4 kg⋅cm (55 oz⋅in), and the recommended upper limit for intermittently permissible torque is 8 kg⋅cm (110 oz⋅in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; 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 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 1800 RPM, 80 mA 0.71 kg⋅cm (10 oz⋅in), 1.8 A
Pololu item #: 4861
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 1800 RPM, 100 mA 0.71 kg⋅cm (10 oz⋅in), 1.8 A
Pololu item #: 3226
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 800 RPM, 80 mA 1.7 kg⋅cm (24 oz⋅in), 1.8 A
Pololu item #: 4862
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 800 RPM, 100 mA 1.7 kg⋅cm (24 oz⋅in), 1.8 A
Pololu item #: 3227
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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.

Key specifications:

voltage no-load performance stall extrapolation
12 V 380 RPM, 80 mA 3.2 kg⋅cm (44 oz⋅in), 1.8 A
Pololu item #: 4863
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 380 RPM, 100 mA 3.2 kg⋅cm (44 oz⋅in), 1.8 A
Pololu item #: 3228
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 230 RPM, 80 mA 4.7 kg⋅cm (65 oz⋅in), 1.8 A
Pololu item #: 4864
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 230 RPM, 100 mA 4.7 kg⋅cm (65 oz⋅in), 1.8 A
Pololu item #: 3229
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 170 RPM, 80 mA 6.4 kg⋅cm (89 oz⋅in), 1.8 A
Pololu item #: 4865
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 170 RPM, 100 mA 6.4 kg⋅cm (89 oz⋅in), 1.8 A
Pololu item #: 3230
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 100 RPM, 80 mA 8.5 kg⋅cm (120 oz⋅in), 1.8 A
Pololu item #: 4866
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 100 RPM, 100 mA 8.5 kg⋅cm (120 oz⋅in), 1.8 A
Pololu item #: 3231
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 79 RPM, 80 mA 11 kg⋅cm (150 oz⋅in), 1.8 A
Pololu item #: 4867
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 79 RPM, 100 mA 11 kg⋅cm (150 oz⋅in), 1.8 A
Pololu item #: 3232
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 46 RPM, 80 mA 18 kg⋅cm (250 oz⋅in), 1.8 A
Pololu item #: 4868
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 46 RPM, 100 mA 18 kg⋅cm (250 oz⋅in), 1.8 A
Pololu item #: 3233
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available with an integrated encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 35 RPM, 80 mA 24 kg⋅cm (330 oz⋅in), 1.8 A
Pololu item #: 4869
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 35 RPM, 100 mA 24 kg⋅cm (330 oz⋅in), 1.8 A
Pololu item #: 4860
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant
 Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specifications:

voltage no-load performance stall extrapolation
12 V 8200 RPM, 100 mA 0.17 kg⋅cm (2.4 oz⋅in), 1.8 A

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