Motors and Gearboxes » Pololu Metal Gearmotors » 20D Metal Gearmotors »
6V Carbon Brush (CB) 20D Gearmotors
These 20D gearmotors have 6 V motors with a stall current of 2.9 A and a typical free-run current of 150 mA. They use the same windings as the 6V versions with precious metal brushes, but they feature long-life carbon brushes. 12V versions are also available that offer approximately the same performance at 12 V as these 6V CB versions offer at 6 V, but with half the current draw. The gearboxes, which are available in a wide range of gear ratios, all have 4 mm diameter, D-shaped output shafts, and the motors are optionally available with an additional 2 mm-diameter output shaft that rotates at the same speed as the input to the gearbox and offers a way to add an encoder, such as our magnetic encoder for 20D mm metal gearmotors.
The following table shows all of the versions available with this 6V CB motor:
| Rated Voltage |
Brush Type |
Stall Current |
No-Load Current |
No-Load Speed (RPM) |
Extrapolated Stall Torque |
Max Power (W) |
 Single-Shaft (Gearbox Only) |
 Dual-Shaft (Gearbox & Motor) |
|
|---|---|---|---|---|---|---|---|---|---|
| (kg ⋅ cm) | (oz ⋅ in) | ||||||||
| 6 V | long-life carbon (CB) |
2.9 A | 0.15 A | 570 | 1.6 | 22 | 2.3 | 25:1 6V CB | 25:1 6V CB dual shaft |
| 450 | 2.0 | 28 | 2.3 | 31:1 6V CB | 31:1 6V CB dual shaft | ||||
| 230 | 4.0 | 56 | 2.4 | 63:1 6V CB | 63:1 6V CB dual shaft | ||||
| 180 | 4.4 | 61 | 2.1 | 78:1 6V CB | 78:1 6V CB dual shaft | ||||
| 140 | 5.4 | 75 | 2.0 | 100:1 6V CB | 100:1 6V CB dual shaft | ||||
| 110 | 6.4 | 89 | 1.9 | 125:1 6V CB | 125:1 6V CB dual shaft | ||||
| 91 | 7.9 | 110 | 1.8 | 156:1 6V CB | 156:1 6V CB dual shaft | ||||
| 73 | 9.4 | 130 | 1.7 | 195:1 6V CB | 195:1 6V CB dual shaft | ||||
| 57 | 12 | 170 | 1.8 | 250:1 6V CB | 250:1 6V CB dual shaft | ||||
| 45 | 13 | 180 | 1.6 | 313:1 6V CB | 313:1 6V CB dual shaft | ||||
| 36 | 16 | 220 | 1.4 | 391:1 6V CB | 391:1 6V CB dual shaft | ||||
| 30 | 21 | 290 | 1.3 | 488:1 6V CB | 488:1 6V CB dual shaft | ||||
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 5 kg-cm (75 oz-in) for the versions with carbon brushes (12V CB and 6V CB) and under 3.5 kg-cm (50 oz-in) for the versions with precious metal brushes. Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes, especially for motors like this that can deliver a lot of power for their size; a general recommendation for brushed DC motors is to limit continuous current to approximately 25% of the stall current.
Versions with other motors are also available. You can use the following selection boxes to choose from all of our 20D metal gearmotor versions:
Alternatives available with variations in these parameter(s): gear ratio motor type extended motor shaft? Select variant…
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Products in category “6V Carbon Brush (CB) 20D Gearmotors”
| Pololu item #: 3700 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 570 RPM, 150 mA | 1.6 kg⋅cm (22 oz⋅in), 2.9 A |
| Pololu item #: 3712 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 570 RPM, 150 mA | 1.6 kg⋅cm (22 oz⋅in), 2.9 A |
| Pololu item #: 3701 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 31.25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 450 RPM, 150 mA | 2.0 kg⋅cm (28 oz⋅in), 2.9 A |
| Pololu item #: 3713 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 31.25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 450 RPM, 150 mA | 2.0 kg⋅cm (28 oz⋅in), 2.9 A |
| Pololu item #: 3702 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 62.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 230 RPM, 150 mA | 4.0 kg⋅cm (56 oz⋅in), 2.9 A |
| Pololu item #: 3714 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 62.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 230 RPM, 150 mA | 4.0 kg⋅cm (56 oz⋅in), 2.9 A |
| Pololu item #: 3703 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 78.13:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 180 RPM, 150 mA | 4.4 kg⋅cm (61 oz⋅in), 2.9 A |
| Pololu item #: 3715 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 78.13:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 180 RPM, 150 mA | 4.4 kg⋅cm (61 oz⋅in), 2.9 A |
| Pololu item #: 3704 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 100:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 140 RPM, 150 mA | 5.4 kg⋅cm (75 oz⋅in), 2.9 A |
| Pololu item #: 3716 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 100:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 140 RPM, 150 mA | 5.4 kg⋅cm (75 oz⋅in), 2.9 A |
| Pololu item #: 3705 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 125:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 110 RPM, 150 mA | 6.4 kg⋅cm (89 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3717 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 125:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 110 RPM, 150 mA | 6.4 kg⋅cm (89 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3706 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 156.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 91 RPM, 150 mA | 7.9 kg⋅cm (110 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3718 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 156.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 91 RPM, 150 mA | 7.9 kg⋅cm (110 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3707 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 195.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 73 RPM, 150 mA | 9.4 kg⋅cm (130 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3719 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 195.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 73 RPM, 150 mA | 9.4 kg⋅cm (130 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3708 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 250:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 57 RPM, 150 mA | 12 kg⋅cm (170 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3720 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 250:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 57 RPM, 150 mA | 12 kg⋅cm (170 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3709 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 312.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 45 RPM, 150 mA | 13 kg⋅cm (180 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3721 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 312.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 45 RPM, 150 mA | 13 kg⋅cm (180 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3710 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 390.6:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 36 RPM, 150 mA | 16 kg⋅cm (220 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3722 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 390.6:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 36 RPM, 150 mA | 16 kg⋅cm (220 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3711 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 488.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 30 RPM, 150 mA | 21 kg⋅cm (290 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
| Pololu item #: 3723 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
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These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 488.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 6 V | 30 RPM, 150 mA | 21 kg⋅cm (290 oz⋅in), 2.9 A |
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
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