This 1.71" x 0.80" x 0.80" gearmotor is a high-quality motor with 25:1 metal gearbox that has the power to deliver both speed and torque. These units have a 0.276"-long, 4 mm-diameter D-shaped output shaft.
Key specs at 6 V: 500 RPM and 250 mA free-run, 20 oz-in (1.5 kg-cm) and 3.3 A stall.
Note: This product has been replaced by a versions with slightly different gearboxes: 29:1 Metal Gearmotor 20Dx41L mm and 73:1 Metal Gearmotor 20Dx42L mm
The face plate has two mounting holes threaded for M2.5 screws. You can use our custom-designed 20D mm metal gearmotor bracket (shown in the left picture below) to mount the 67:1 and 25:1 versions of this gearmotor to your project via these mounting holes and the screws that come with the bracket.
|Pololu 20D mm gearmotor with bracket and hub.||
|White Pololu 60×8mm wheel on a Pololu 20D mm metal gearmotor.|
Please note that the 20D mm line of 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 right picture above). The gearbox’s output shaft works directly with the 120mm-diameter Wild Thumper wheels, as shown below.
|Dagu Wild Thumper wheel 120×60mm (metallic red) with Pololu 20D mm metal gearmotor.|
Dimension Diagram for the 25:1 and 67:1 versions
The picture below shows the dimensions (in mm) of the 25:1 and 67:1 versions of our 20D mm line of gearmotors. The value of
X is 18.5 mm for the 25:1 20Dx44L mm version and 20 mm for the 67:1 20Dx45L mm version
|25:1 and 67:1 20D mm metal gearmotor dimensions (units in mm). Note: this diagram only applies to the older and now-discontinued 25:1 and 67:1 gear ratio versions.|
Note: 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. Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.
Selecting the Right Gearmotor
We offer a wide selection of metal gearmotors that offer different combinations of speed and torque. Our metal gearmotor comparison table can help you find the motor that best meets your project’s requirements.
|Some of the Pololu metal gearmotors.|
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