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20.4:1 Metal Gearmotor 25Dx65L mm MP 12V with 48 CPR Encoder
This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 20.4:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 979.62 counts per revolution of the gearbox’s output shaft. The gearmotor is cylindrical, with a diameter just under 25 mm, and the D-shaped output shaft is 4 mm in diameter and extends 12.5 mm from the face plate of the gearbox. This gearmotor is also available without an encoder.
Key specifications:
| voltage | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 380 RPM, 100 mA | 3.2 kg⋅cm (44 oz⋅in), 1.8 A |
Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…
Compare all products in 12V Medium-Power (MP) 25D mm Gearmotors.
| Description | Specs (20) | Pictures (11) | Resources (4) | FAQs (3) | On the blog (0) | Distributors (38) |
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File downloads
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Datasheet for Pololu 25D Metal Gearmotors (2MB pdf)
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Dimension diagram of the Pololu 25D Metal Gearmotors (171k pdf)
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3D models of 25D mm gearmotors (10MB zip)
This file contains 3D models (in the step file format) of the 25D mm gearmotors with and without encoders.
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Modifying the Wild Thumper to use motors with encoders (3MB pdf)
Customer Richard Nguyen has documented his work modifying the Wild Thumper chassis to use 25D motors with encoders in place of the chassis’s included motors.
Note: This is not an easy modification, and the chassis can be damaged if it is not done properly, so we generally recommend against it, and we can only provide very limited support for those who want to attempt it. The manufacturer did not intend for the chassis to be modified in this way, and we do not know how well such a modification will work out.
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