This gearmotor uses a motor with extra-strong magnets and a 34:1 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. Key specs at 6 V: 165 RPM and 80 mA free-run, 40 oz-in (2.9 kg-cm) and 2.2 A stall.
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Our Code: MEC-30129
Supplier Link: [Pololu MPN:1584]
These motors are intended for use at 6 V. In general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range, though they can begin rotating at voltages as low as 1 V. Higher voltages could start negatively affecting the life of the motor.
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-, 80mm -diameter) or custom wheels and mechanisms to the gearmotor’s output shaft (see the left picture below).
We also stock Pololu's 25D Metal Gearmotor Bracket Pair that fits these motors.
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.
The diagram below shows the dimensions (in mm) of the 25D mm line of gearmotors. The value of 'L' is 21mm for this motor.
| Size: | 25D x 52L mm |
|---|---|
| Weight: | 100g |
| Shaft diameter: | 4 mm |
| Gear ratio: | 34:1 |
|---|---|
| Free-run speed @ 6V: | 165 rpm |
| Free-run current @ 6V: | 80 mA |
| Stall current @ 6V: | 2200 mA |
| Stall torque @ 6V: | 2.9kg/cm |
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