25:1 Metal Gearmotor 20Dx44L mm
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.
Alternatives available with variations in these parameter(s): gear ratio
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Pololu 20D mm gearmotor with bracket and hub.
White Pololu 60×8mm wheel on a Pololu 20D mm metal gearmotor.
Dagu Wild Thumper wheel 120×60mm (metallic red) with Pololu 20D mm metal gearmotor.
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.
20D mm metal gearmotor dimensions (units in mm; L depends on gear ratio).