This powerful brushed DC gearmotor is available in six different gear ratios. Versions with an integrated quadrature encoder are also available, including just the motor and encoder portion by itself (no gearbox).
These motors are intended for use at 12 V, though in general, these kinds of motors can run at voltages above and below the nominal voltage (they can begin rotating at voltages as low as 1 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.
Details for item #1103
Exact gear ratio: ``(25×30×40) / (10×10×10) = bb(30:1)``
April 2014 update: We have changed the gear ratio in this product’s name from “29:1” to “30:1” so the name more accurately reflects the product. The product itself has not changed.
The face plate has six mounting holes evenly spaced around the outer edge threaded for M3 screws. These mounting holes form a regular hexagon and the centers of neighboring holes are 15.5 mm apart. We carry two brackets for these gearmotors: a stamped aluminum L-bracket (sold in pairs) and a sturdier, tombstone-style machined aluminum bracket (sold individually):
|Gearmotor with bracket and hub.||
|Pololu machined aluminum bracket for 37D mm metal gearmotors mounting a motor to a clear piece of acrylic.|
The 6 mm diameter gearbox output shaft works with the Pololu universal aluminum mounting hub for 6mm shafts, which can be used to mount our larger Pololu wheels (80mm- and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft as shown in the left picture below. Alternatively, you could use our 6mm scooter wheel adapter to mount many common scooter, skateboard, and inline skate wheels to the gearmotor’s output shaft as shown in the right picture below:
|Black Pololu 90×10mm wheel on a Pololu 37D mm metal gearmotor.||
|A 37D mm gearmotor connected to a scooter wheel by the 6 mm scooter wheel adapter.|
The picture below shows the dimensions (in mm) of the 37D mm line of gearmotors. The value of
X is 22 mm for the 19:1 37Dx52L mm and 30:1 37Dx52L mm versions, 24 mm for the 50:1 37Dx54L mm and 70:1 37Dx54L mm versions, and 26.5 mm for the 100:1 37Dx57L mm and 131:1 37Dx57L mm versions.
|37D mm metal gearmotor dimensions (units in mm).|
Warning: Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no further than 3mm (1/8") into the screw hole.
|37D mm metal gearmotor next to a micro metal gearmotor for size comparison.|
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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