This cylindrical, 2.28" x 0.98" x 0.98" brushed DC gearmotor with a 378:1 metal gearbox is a lower-current , lower-speed alternative to our 25D mm HP gearmotors. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft.
Key specs at 6 V: 15 RPM and 80 mA free-run, 250 oz-in (18.0 kg-cm) and 2.2 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)
These gearmotors have output shafts with a diameter of 4 mm. The Pololu universal aluminum mounting hub for 4mm shafts can be used to mount our larger Pololu wheels (60mm-, 70mm-, 80mm-, and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft (see the left picture below). These are the same type of motors used in the Wild Thumper all-terrain chassis, and the gearbox’s output shaft works directly with the 120mm-diameter Wild Thumper wheels.
The face plate has two mounting holes threaded for M3 screws. You can use our custom-designed 25D mm metal gearmotor bracket (shown in the picture below) to mount the gearmotor to your project via these mounting holes and the screws that come with the bracket.
|Pololu 25D mm gearmotor with bracket.|
The diagram below shows the dimensions (in mm) of the 25D mm line of gearmotors. The value of
L is shown in the table below.
|Dimension diagram (in mm) for the 25D mm metal gearmotors.|
|Size:||25D x 58L mm|
|Shaft diameter:||4 mm|
|Free-run speed @ 6V:||15 rpm|
|Free-run current @ 6V:||80 mA|
|Stall current @ 6V:||2200 mA1|
|Stall torque @ 6V:||250 oz·in1|
This is a theoretical value; stalling the gearbox output shaft is likely to damage the gearbox.