This gearmotor is a powerful brushed DC motor with 102.08:1 metal gearbox intended for operation at 24 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft.

Dimensions :

Size: 37D × 57L mm
Weight: 195 g
Shaft diameter: 6 mm

General specifications 4685:

Gear ratio: 102.08:1
No-load speed @ 24V: 100 rpm
No-load current @ 24V: 0.1 A
Stall current @ 24V: 3 A
Stall torque @ 24V: 39 kg·cm
Max output power @ 24V: 8 W
No-load speed @ 12V: 49 rpm
No-load current @ 12V: 0.08 A
Stall current @ 12V: 1.7 A
Stall torque @ 12V: 24 kg·cm5
Motor type: 24V

General specifications 4686:

Gear ratio: 131.25:1
No-load speed @ 24V: 79 rpm
No-load current @ 24V: 0.1 A
Stall current @ 24V: 3 A
Stall torque @ 24V: 47 kg·cm
Max output power @ 24V: 6 W4
No-load speed @ 12V: 39 rpm
No-load current @ 12V: 0.08 A
Stall current @ 12V: 1.7 A
Stall torque @ 12V: 30 kg·cm
Motor type: 24V

Documents:

Package Includes:

1 x Pololu 4685 / 4686 Metal Gearmotor 37Dx57L mm 24V - Helical Pinion

Motor Specifications
Type	195g
Speed (RPM)	6mm
Torque	3A
Gear Ratio	4685-100:1, 4686-131:1
Shaft Diameter	4685-39 kg⋅cm, 4686-47 kg⋅cm
Electrical Specifications
Maximum Operating Voltage	4685-100:1, 4686-131:1
Minimum Operating Current	24V
Physical Attributes
Weight	4685-100rpm, 4686-79rpm
Dimensions	37Dx57L mm
Additional Information
Warranty	Brushed Metal Gearmotor