313:1 Metal Gearmotor 20Dx46L mm 6V

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 312.5:1 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: 46 RPM and 170 mA with no-load, 16 kg-cm and 2.9 A at stall.  Note: the gearbox torque limit is 5 kg-cm.

Specifications:

• Size: 20D × 46L mm
• Weight: 46 g
• Shaft diameter: 4 mm
• Gear ratio: 312.5:1
• Free-run speed @ 6V: 45 rpm
• Free-run current @ 6V: 170 mA
• Stall current @ 6V: 2.9 A
• Stall torque @ 6V: 16 kg-cm
• Extended motor shaft?: N
• Motor type: 2.9A stall @ 6V