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78:1 Metal Gearmotor 20Dx43L mm 6V CB with Extended Motor Shaft
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.
|voltage||no-load performance||stall extrapolation|
|6 V||180 RPM, 150 mA||4.4 kg⋅cm (61 oz⋅in), 2.9 A|
Alternatives available with variations in these parameter(s): gear ratio motor type extended motor shaft? Select variant…
Compare all products in 6V Carbon Brush (CB) 20D Gearmotors.
|Description||Specs (17)||Pictures (14)||Resources (3)||FAQs (1)||On the blog (0)|
|Size:||20D × 44.7L mm1|
|Shaft diameter:||4 mm2|
|No-load speed @ 6V:||180 rpm|
|No-load current @ 6V:||0.15 A|
|Stall current @ 6V:||2.9 A3|
|Stall torque @ 6V:||4.4 kg·cm3|
|Max output power @ 6V:||2.1 W|
|Extended motor shaft?:||Y|
|Long-life carbon brushes?:||Y|
|Motor type:||2.9A stall @ 6V CB (carbon brush)|
Performance at maximum efficiency
|Max efficiency @ 6V:||33 %|
|Speed at max efficiency:||150 rpm|
|Torque at max efficiency:||0.76 kg·cm|
|Current at max efficiency:||0.59 A|
|Output power at max efficiency:||1.2 W|
- Not including output shafts; output shafts add 24 mm to the total length.
- D shaft.
- 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.