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- Manufacturer: Pololu
- Order number: EXP-R25-989
- Manufacturer part number: 3705
- Availability: 3
- country of origin: CN
- HS code: 85011099
- Weight (kg): 0.047
These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor with long-life carbon brushes combined with a 125:1 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.
Key specs at 6 V: 120 RPM and 170 mA with no load, 87 oz-in (6.3 kg-cm) and 2.9 A at stall. Note: the gearbox torque limit is 70 oz-in (5 kg-cm).
- Size: 20D × 44L mm
- Weight: 46 g
- Shaft diameter: 4 mm
- Gear ratio: 125:1
- Free-run speed @ 6V: 120 rpm
- Free-run current @ 6V: 170 mA
- Stall current @ 6V: 2.9 A
- Stall torque @ 6V: 6.3 kg-cm
- Extended motor shaft?: N
- Motor type: 2.9A stall @ 6V CB (carbon brush)