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 170 mA. They use the same windings as the 6V versions with precious metal brushes, but they feature long-life carbon brushes. 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
@ Rated Voltage
No-Load
Speed
@ Rated Voltage
Approximate
Stall Torque
@ Rated Voltage


Single-Shaft
(Gearbox Only)


Dual-Shaft
(Gearbox & Motor)
6 V long-life
carbon
(CB)
2.9 A 590 RPM 22 oz-in 25:1 6V CB 25:1 6V CB dual shaft
470 RPM 28 oz-in 31:1 6V CB 31:1 6V CB dual shaft
230 RPM 54 oz-in 63:1 6V CB 63:1 6V CB dual shaft
190 RPM 62 oz-in 78:1 6V CB 78:1 6V CB dual shaft
150 RPM 72 oz-in 100:1 6V CB 100:1 6V CB dual shaft
120 RPM 87 oz-in 125:1 6V CB 125:1 6V CB dual shaft
93 RPM 110 oz-in 156:1 6V CB 156:1 6V CB dual shaft
75 RPM 130 oz-in 195:1 6V CB 195:1 6V CB dual shaft
60 RPM 170 oz-in 250:1 6V CB 250:1 6V CB dual shaft
46 RPM 220 oz-in 313:1 6V CB 313:1 6V CB dual shaft
37 RPM 260 oz-in 391:1 6V CB 391:1 6V CB dual shaft
30 RPM 310 oz-in 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 50 oz-in (3.5 kg*cm) for the versions with precious metal brushes and under 70 oz-in (5 kg-cm) for the versions with carbon brushes (the ones with “CB” in the name). Stalls can also result in rapid (potentially on the order of a second) 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:

Select options:

Products in category “6V Carbon Brush (CB) 20D Gearmotors”

Pololu item #: 3700
Brand: Pololu
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 specs at 6 V: 590 RPM and 170 mA with no-load, 22 oz-in (1.6 kg-cm) and 2.9 A at stall.

Pololu item #: 3712
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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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 specs at 6 V: 590 RPM and 170 mA with no-load, 22 oz-in (1.6 kg-cm) and 2.9 A at stall.

Pololu item #: 3701
Brand: Pololu
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 specs at 6 V: 470 RPM and 170 mA with no load, 28 oz-in (2.0 kg-cm) and 2.9 A at stall.

Pololu item #: 3713
Brand: Pololu
Status: Active and Preferred 
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Out of stock.
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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 specs at 6 V: 470 RPM and 170 mA with no load, 28 oz-in (2.0 kg-cm) and 2.9 A at stall.

Pololu item #: 3702
Brand: Pololu
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 specs at 6 V: 230 RPM and 170 mA at no load, 54 oz-in (3.9 kg-cm) and 2.9 A at stall.

Pololu item #: 3714
Brand: Pololu
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 specs at 6 V: 230 RPM and 170 mA at no load, 54 oz-in (3.9 kg-cm) and 2.9 A at stall.

Pololu item #: 3703
Brand: Pololu
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 specs at 6 V: 190 RPM and 170 mA with no load, 62 oz-in (4.5 kg-cm) and 2.9 A at stall.

Pololu item #: 3715
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 190 RPM and 170 mA with no load, 62 oz-in (4.5 kg-cm) and 2.9 A at stall.

Pololu item #: 3704
Brand: Pololu
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 specs at 6 V: 150 RPM and 170 mA with no load, 72 oz-in (5.2 kg-cm) and 2.9 A at stall.

Pololu item #: 3716
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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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 specs at 6 V: 150 RPM and 170 mA with no load, 72 oz-in (5.2 kg-cm) and 2.9 A at stall.

Pololu item #: 3705
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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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 specs at 6 V: 120 RPM and 170 mA with no load, 87 oz-in (6.3 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3717
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 120 RPM and 170 mA with no load, 87 oz-in (6.3 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3706
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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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 specs at 6 V: 93 RPM and 170 mA with no load, 110 oz-in (7.9 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3718
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 93 RPM and 170 mA with no load, 110 oz-in (7.9 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3707
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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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 specs at 6 V: 75 RPM and 170 mA with no load, 130 oz-in (9.5 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3719
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 75 RPM and 170 mA with no load, 130 oz-in (9.5 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3708
Brand: Pololu
Status: Active and Preferred 
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Temporarily out of stock. See product page to backorder.
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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 specs at 6 V: 60 RPM and 170 mA with no load, 170 oz-in (12 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3720
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 60 RPM and 170 mA with no load, 170 oz-in (12 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3709
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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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 specs at 6 V: 46 RPM and 170 mA with no load, 220 oz-in (16 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3721
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 46 RPM and 170 mA with no load, 220 oz-in (16 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3710
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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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 specs at 6 V: 37 RPM and 170 mA with no load, 260 oz-in (19 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3722
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 37 RPM and 170 mA with no load, 260 oz-in (19 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3711
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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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 specs at 6 V: 30 RPM and 170 mA with no load, 310 oz-in (23 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

Pololu item #: 3723
Brand: Pololu
Status: Active and Preferred 
Free shipping in USA 
Temporarily out of stock. See product page to backorder.
Out of stock.
Quantity:

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 specs at 6 V: 30 RPM and 170 mA with no load, 310 oz-in (23 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.

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