Motors and Gearboxes » Pololu Metal Gearmotors » 25D Metal Gearmotors »
6V High-Power (HP) 25D mm Gearmotors
These 25D mm gearmotors have high-power (HP), 6 V motors with a stall current of 6 A and a typical free-run current of 500 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 HP 6V 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) | |||||||||
| High-Power (HP) 6 V |
6 V | 6.0 A | 420 mA w/o encoder 500 mA with encoder |
1:1 (no gearbox) | 10,000 | 0.3 | 4 | 7 | – | item #4800 |
| 4.4:1 | 2200 | 1.2 | 17 | 6.7 | item #1570 | item #4801 | ||||
| 9.7:1 | 1000 | 2.3 | 32 | 5.9 | item #1571 | item #4802 | ||||
| 20.4:1 | 480 | 4.8 | 67 | 5.9 | item #1572 | item #4803 | ||||
| 34:1 | 290 | 6.8 | 94 | 5.1 | item #1573 | item #4804 | ||||
| 47:1 | 210 | 9.1 | 130 | 4.9 | item #1574 | item #4805 | ||||
| 75:1 | 130 | 14 | 190 | 4.5 | item #1575 | item #4806 | ||||
| 99:1 | 99 | 15 | 210 | 3.9 | item #1576 | item #4807 | ||||
| 172:1 | 57 | 27 | 380 | – | item #1577 | item #4808 | ||||
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…
Compare all products in this category
Products in category “6V High-Power (HP) 25D mm Gearmotors”
| Pololu item #: 1570 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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 Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 2200 RPM, 420 mA | 1.2 kg⋅cm (17 oz⋅in), 6.0 A |
| Pololu item #: 4801 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 2200 RPM, 500 mA | 1.2 kg⋅cm (17 oz⋅in), 6.0 A |
| Pololu item #: 1571 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 1000 RPM, 420 mA | 2.3 kg⋅cm (32 oz⋅in), 6.0 A |
| Pololu item #: 4802 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 1000 RPM, 500 mA | 2.3 kg⋅cm (32 oz⋅in), 6.0 A |
| Pololu item #: 1572 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 480 RPM, 420 mA | 4.8 kg⋅cm (67 oz⋅in), 6.0 A |
| Pololu item #: 4803 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 480 RPM, 500 mA | 4.8 kg⋅cm (67 oz⋅in), 6.0 A |
| Pololu item #: 1573 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 290 RPM, 420 mA | 6.8 kg⋅cm (94 oz⋅in), 6.0 A |
| Pololu item #: 4804 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 290 RPM, 500 mA | 6.8 kg⋅cm (94 oz⋅in), 6.0 A |
| Pololu item #: 1574 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 210 RPM, 420 mA | 9.1 kg⋅cm (130 oz⋅in), 6.0 A |
| Pololu item #: 4805 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 210 RPM, 500 mA | 9.1 kg⋅cm (130 oz⋅in), 6.0 A |
| Pololu item #: 1575 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 130 RPM, 420 mA | 14 kg⋅cm (190 oz⋅in), 6.0 A |
| Pololu item #: 4806 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 130 RPM, 500 mA | 14 kg⋅cm (190 oz⋅in), 6.0 A |
| Pololu item #: 1576 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 99 RPM, 420 mA | 15 kg⋅cm (210 oz⋅in), 6.0 A |
| Pololu item #: 4807 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 99 RPM, 500 mA | 15 kg⋅cm (210 oz⋅in), 6.0 A |
| Pololu item #: 1577 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 |
|---|---|---|
| 6 V | 57 RPM, 420 mA | 27 kg⋅cm (380 oz⋅in), 6.0 A |
| Pololu item #: 4808 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This gearmotor consists of a high-power, 6 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 8245.81 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 |
|---|---|---|
| 6 V | 57 RPM, 500 mA | 27 kg⋅cm (380 oz⋅in), 6.0 A |
| Pololu item #: 4800 | |
| Brand: Pololu | |
| Status: Active and Preferred | |
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Free shipping in USA
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This is the motor and encoder portion of our high-power (HP), 6V 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 |
|---|---|---|
| 6 V | 10000 RPM, 500 mA | 0.3 kg⋅cm (4 oz⋅in), 6.0 A |
| Pololu item #: 2271 | |
| Brand: Pololu | |
| Status: Clearance | |
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Free shipping in USA
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Clearance: This is being replaced by a functionally identical version that has a removable protective end cap over the encoder.
This gearmotor consists of a high-power, 6 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 990 RPM, 550 mA | 2.8 kg⋅cm (39 oz⋅in), 6.5 A |
| Pololu item #: 2272 | |
| Brand: Pololu | |
| Status: Clearance | |
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Free shipping in USA
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Clearance: This is being replaced by a functionally identical version that has a removable protective end cap over the encoder.
This gearmotor consists of a high-power, 6 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 460 RPM, 550 mA | 5.5 kg⋅cm (75 oz⋅in), 6.5 A |
| Pololu item #: 2274 | |
| Brand: Pololu | |
| Status: Clearance | |
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Free shipping in USA
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Clearance: This is being replaced by a functionally identical version that has a removable protective end cap over the encoder.
This gearmotor consists of a high-power, 6 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 200 RPM, 550 mA | 8.5 kg⋅cm (115 oz⋅in), 6.5 A |
| Pololu item #: 2276 | |
| Brand: Pololu | |
| Status: Clearance | |
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Free shipping in USA
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Clearance: This is being replaced by a functionally identical version that has a removable protective end cap over the encoder.
This gearmotor consists of a high-power, 6 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 97 RPM, 550 mA | 15 kg⋅cm (210 oz⋅in), 6.5 A |
| Pololu item #: 2277 | |
| Brand: Pololu | |
| Status: Clearance | |
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This gearmotor has been replaced by a functionally identical version with a removable protective end cap over the encoder
Clearance: This is being replaced by a functionally identical version that has a removable protective end cap over the encoder.
This gearmotor consists of a high-power, 6 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 8245.81 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 specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 56 RPM, 550 mA | 25 kg⋅cm (350 oz⋅in), 6.5 A |
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