172:1 Metal Gearmotor 25Dx56L mm HP

172:1 Metal Gearmotor 25Dx56L mm HP
Pololu item #: 1577 59 in stock

Price break Unit price (US$)
1 21.95
10 19.76

backorders allowed

This cylindrical, 2.2" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 171.79:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor.

Key specs at 6 V: 57 RPM and 450 mA free-run, 260 oz-in (18.7 kg-cm) and 6 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)

Select options:
 Description Specs (8) Pictures (3) Resources (0) FAQs (1) On the blog (0) 


Size: 25D x 56L mm
Weight: 3.3 oz
Shaft diameter: 4 mm

General specifications

Gear ratio: 171.79:1
Free-run speed @ 6V: 57 rpm
Free-run current @ 6V: 450 mA
Stall current @ 6V: 6000 mA1
Stall torque @ 6V: 260 oz·in1


This is a theoretical value; stalling the gearbox output shaft is likely to damage the gearbox.