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 (70 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…

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

Pololu item #: 3700
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:

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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
Status: Active and Preferred 
RoHS 3 compliant
 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.

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
Status: Active and Preferred 
RoHS 3 compliant
 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 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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