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156:1 Metal Gearmotor 20Dx44L mm 12V CB with Extended Motor Shaft
These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 12V 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.
|voltage||no-load performance||stall extrapolation|
|12 V||89 RPM, 80 mA||9.0 kg⋅cm (130 oz⋅in), 1.6 A|
Note: the gearbox torque limit is 70 oz-in (5 kg-cm); see detailed description for important product limitations.
Alternatives available with variations in these parameter(s): gear ratio motor type extended motor shaft? Select variant…
Compare all products in 12V Carbon Brush (CB) 20D Gearmotors.
|Description||Specs (20)||Pictures (14)||Resources (3)||FAQs (1)||On the blog (0)|
|Size:||20D × 46.2L mm1|
|Shaft diameter:||4 mm2|
|No-load speed @ 12V:||89 rpm|
|No-load current @ 12V:||0.08 A|
|Stall current @ 12V:||1.6 A3|
|Stall torque @ 12V:||9.0 kg·cm3|
|Max output power @ 12V:||2.0 W|
|No-load speed @ 6V:||45 rpm4|
|Stall current @ 6V:||0.8 A4|
|Stall torque @ 6V:||4.5 kg·cm4|
|Extended motor shaft?:||Y|
|Long-life carbon brushes?:||Y|
|Motor type:||1.6A stall @ 12V CB (carbon brush)|
Performance at maximum efficiency
|Max efficiency @ 12V:||31 %|
|Speed at max efficiency:||75 rpm|
|Torque at max efficiency:||1.5 kg·cm|
|Current at max efficiency:||0.30 A|
|Output power at max efficiency:||1.1 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.
- This motor will run at 6 V but is intended for operation at 12 V.