25:1 Metal Gearmotor 20Dx41L mm 6V with Extended Motor Shaft
These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox.
This version also has a 6 × 2 mm extended motor shaft.
Key specs at 6 V: 590 RPM and 170 mA with no-load, 22 oz-in (1.6 kg-cm) and 2.9 A at stall.
The gearmotors all have 20 mm diameter gearboxes and 4 mm diameter gearbox output shafts, so it is generally easy to swap one version for another if your design requirements change (though the length of the gearbox tends to increase with the gear ratio).
These gearmotors have an additional 2 mm-diameter output shaft that protrudes 6 mm from the rear of the motor. This rear shaft rotates at the same speed as the input to the gearbox and offers a way to add an encoder.
|Size:||20D × 41L mm|
|Shaft diameter:||4 mm|
|No-load speed @ 6V:||590 rpm|
|No-load current @ 6V:||170 mA|
|Stall current @ 6V:||2.9 A|
|Stall torque @ 6V:||22 oz·in|
|Extended motor shaft?:||Y|
|Motor type:||2.9A stall @ 6V|
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