Mini Plastic Gearmotors »
120:1 Mini Plastic Gearmotor, Offset 2mm Spline Output
This compact, inexpensive, low-current gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. While intended for operation at 4.5 V, it should run comfortably in the 3 V to 6 V range. The splined output shaft has a crest diameter of 2 mm and is offset from but parallel to the motor shaft. The gearbox is protected by a built-in safety clutch that helps protect the gears from excessive loads.
|voltage||no-load performance||stall extrapolation|
|4.5 V||120 RPM, 80 mA||1.4 kg⋅cm (20 oz⋅in), 800 mA|
Alternatives available with variations in these parameter(s): shaft type no-load speed @ 4.5V extended motor shaft? Select variant…
|Description||Specs (11)||Pictures (6)||Resources (2)||FAQs (1)||On the blog (0)|
dimension diagram: offset 2mm spline version (76k pdf)
Dimension diagram of the mini plastic gearmotor with offset 2mm spline output.
MATLAB script to plot motor performance curves for Pololu brushed DC gearmotors
This MATLAB script, written by Ali Asgher Mansoor Habiby, plots speed, power, current draw, and efficiency as they vary with torque when you input the gearmotor specifications. It also prints the resistance of the motor, and the current draw and torque at which maximum efficiency and maximum power occur.