31:1 Metal Gearmotor 20Dx41L mm 6V CB

Pololu item #: 3701
Brand: Pololu supply outlook
Status: Active and Preferred 
RoHS 3 compliant

Price break Unit price (US$)
1 28.95
5 26.63
25 24.50
100 22.54


backorders allowed

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

Alternatives available with variations in these parameter(s): gear ratio motor type extended motor shaft? Select variant…

 Description Specs (17) Pictures (14) Resources (3) FAQs (1) On the blog (0) 

Dimensions

Size: 20D × 43.2L mm1
Weight: 44 g
Shaft diameter: 4 mm2

General specifications

Gear ratio: 31.25:1
No-load speed @ 6V: 450 rpm
No-load current @ 6V: 0.15 A
Stall current @ 6V: 2.9 A3
Stall torque @ 6V: 2.0 kg·cm3
Max output power @ 6V: 2.3 W
Extended motor shaft?: N
Long-life carbon brushes?: Y
Motor type: 2.9A stall @ 6V CB (carbon brush)

Performance at maximum efficiency

Max efficiency @ 6V: 37 %
Speed at max efficiency: 360 rpm
Torque at max efficiency: 0.39 kg·cm
Current at max efficiency: 0.65 A
Output power at max efficiency: 1.4 W

Notes:

1
Not including output shaft; output shaft adds 18 mm to the total length.
2
D shaft.
3
Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. As the motor heats up, as happens as it approaches an actual stall, the stall torque and current decrease.

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Related Categories

6V Carbon Brush (CB) 20D Gearmotors
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Brushed DC Motor Controllers
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