Description:

This gearmotor is a powerful 12V brushed DC motor with a 102.08:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 6533 counts per revolution of the gearbox’s output shaft. 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.

Features:

Dimensions

• Size: 37D × 72.5L mm1
• Weight: 210 g
• Shaft diameter: 6 mm2
• General specifications
• Gear ratio: 102.08:1
• No-load speed @ 12V: 100 rpm
• No-load current @ 12V: 0.2 A
• Stall current @ 12V: 5.5 A3
• Stall torque @ 12V: 34 kg·cm3
• Max output power @ 12V: 8 W4
• No-load speed @ 6V: 49 rpm5
• No-load current @ 6V: 0.15 A5
• Stall current @ 6V: 3.0 A5
• Stall torque @ 6V: 21 kg·cm5
• Motor type: 12V

Performance at maximum efficiency

• Max efficiency @ 12V: 44 %
• Speed at max efficiency: 87 rpm
• Torque at max efficiency: 4.2 kg·cm
• Current at max efficiency: 0.72 A
• Output power at max efficiency: 3.8 W

General specifications

• Lead length: 20 cm6
• Encoders?: Y
• Encoder resolution: 64 CPR

Documents:

• Datasheet for Pololu 37D Metal Gearmotors (2MB pdf)
  
• Dimension diagrams of the Pololu 37D mm Metal Gearmotors (459k pdf)
• 3D models of 37D mm gearmotors (7MB zip)
• This file contains 3D models (in the step file format) of the 37D mm gearmotors with and without encoders.