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12V 37D Metal Gearmotors
These 37D gearmotors have 12 V motors with a stall current of 5.5 A and a typical free-run current of 200 mA. They are available in a range of gear ratios from 6.3:1 to 150:1, and all versions are available with integrated 64 CPR quadrature encoders on the motor shafts.
The following table shows all of the versions available with this 12 V motor (see the 37D metal gearmotor datasheet (2MB pdf) for more information, including detailed performance graphs for each gearmotor version):
| 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) | ||||||||
| 12 V | 5.5 A | 0.2 A | 1:1 (no gearbox) | 10,000 | 0.5 | 7 | – | – | item #4750 |
| 6.3:1 | 1600 | 3.0 | 42 | 12 | item #4747 | item #4757 | |||
| 10:1 | 1000 | 4.9 | 68 | 12 | item #4748 | item #4758 | |||
| 19:1 | 530 | 8.5 | 120 | 12 | item #4741 | item #4751 | |||
| 30:1 | 330 | 14 | 190 | 12 | item #4742 | item #4752 | |||
| 50:1 | 200 | 21 | 290 | 10 | item #4743 | item #4753 | |||
| 70:1 | 150 | 27 | 380 | 10* | item #4744 | item #4754 | |||
| 100:1 | 100 | 34 | 470 | 8* | item #4745 | item #4755 | |||
| 131:1 | 76 | 45 | 630 | 6* | item #4746 | item #4756 | |||
| 150:1 | 67 | 49 | 680 | 6* | item #2829 | item #2828 | |||
| * Output power for these units is constrained by gearbox load limits; spec provided is output power at max recommended load of 10 kg⋅cm. | |||||||||
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 10 kg-cm (150 oz-in), and the recommended upper limit for instantaneous torque is 25 kg-cm (350 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.
24 V versions are also available that offer approximately the same performance at 24 V as these 12 V versions offer at 12 V, but with half the current draw.
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Products in category “12V 37D Metal Gearmotors”
| Pololu item #: 4757 | |
| Brand: Pololu | supply outlook |
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This gearmotor is a powerful 12V brushed DC motor with a 6.25:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 400 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 1600 RPM, 200 mA | 3.0 kg⋅cm (42 oz⋅in), 5.5 A |
| Pololu item #: 4747 | |
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This gearmotor is a powerful brushed DC motor with 6.25:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 1600 RPM, 200 mA | 3.0 kg⋅cm (42 oz⋅in), 5.5 A |
| Pololu item #: 4758 | |
| Brand: Pololu | supply outlook |
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This gearmotor is a powerful 12V brushed DC motor with a 10:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 640 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 1000 RPM, 200 mA | 4.9 kg⋅cm (68 oz⋅in), 5.5 A |
| Pololu item #: 4748 | |
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This gearmotor is a powerful brushed DC motor with 10:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 1000 RPM, 200 mA | 4.9 kg⋅cm (68 oz⋅in), 5.5 A |
| Pololu item #: 4751 | |
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This gearmotor is a powerful 12V brushed DC motor with a 18.75:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 1200 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 530 RPM, 200 mA | 8.5 kg⋅cm (120 oz⋅in), 5.5 A |
| Pololu item #: 4741 | |
| Brand: Pololu | supply outlook |
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This gearmotor is a powerful brushed DC motor with 18.75:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 530 RPM, 200 mA | 8.5 kg⋅cm (120 oz⋅in), 5.5 A |
| Pololu item #: 4752 | |
| Brand: Pololu | supply outlook |
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This gearmotor is a powerful 12V brushed DC motor with a 30:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 1920 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 330 RPM, 200 mA | 14 kg⋅cm (190 oz⋅in), 5.5 A |
| Pololu item #: 4742 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 30:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 330 RPM, 200 mA | 14 kg⋅cm (190 oz⋅in), 5.5 A |
| Pololu item #: 4753 | |
| Brand: Pololu | supply outlook |
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This gearmotor is a powerful 12V brushed DC motor with a 50:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft, which corresponds to 3200 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 200 RPM, 200 mA | 21 kg⋅cm (290 oz⋅in), 5.5 A |
| Pololu item #: 4743 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 50:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 200 RPM, 200 mA | 21 kg⋅cm (290 oz⋅in), 5.5 A |
| Pololu item #: 4754 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful 12V brushed DC motor with a 70:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 4480 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 150 RPM, 200 mA | 27 kg⋅cm (380 oz⋅in), 5.5 A |
| Pololu item #: 4744 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 70:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 150 RPM, 200 mA | 27 kg⋅cm (380 oz⋅in), 5.5 A |
| Pololu item #: 4755 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful 12V brushed DC motor with a 102.08:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 6533 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 100 RPM, 200 mA | 34 kg⋅cm (470 oz⋅in), 5.5 A |
| Pololu item #: 4745 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 102.08:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 100 RPM, 200 mA | 34 kg⋅cm (470 oz⋅in), 5.5 A |
| Pololu item #: 4756 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful 12V brushed DC motor with a 131.25:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 8400 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 76 RPM, 200 mA | 45 kg⋅cm (630 oz⋅in), 5.5 A |
| Pololu item #: 4746 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 131.25:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 76 RPM, 200 mA | 45 kg⋅cm (630 oz⋅in), 5.5 A |
| Pololu item #: 2828 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful 12V brushed DC motor with a 150:1 metal gearbox and an integrated quadrature encoder with a resolution of 64 counts per revolution (CPR) of the motor shaft and 9600 CPR of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 67 RPM, 200 mA | 49 kg⋅cm (680 oz⋅in), 5.5 A |
| Pololu item #: 2829 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This gearmotor is a powerful brushed DC motor with 150:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 67 RPM, 200 mA | 49 kg⋅cm (680 oz⋅in), 5.5 A |
| Pololu item #: 4750 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the motor and encoder portion of our 12V 37D mm metal gearmotors with 64 CPR encoders. It does not include a gearbox, but the pinion gear on the output shaft works with all of our helical pinion 37D 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 | 10,000 RPM, 200 mA | 0.5 kg⋅cm (7 oz⋅in), 5.5 A |
| Pololu item #: 4690 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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This is the motor and encoder portion of our 24V 37D mm metal gearmotors with 64 CPR encoders. It does not include a gearbox, but the pinion gear on the output shaft works with all of our helical pinion 37D 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 |
|---|---|---|
| 24 V | 10,000 RPM, 100 mA | 0.55 kg⋅cm (8 oz⋅in), 3 A |
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