Pololu 131:1 Metal Gearmotor 37Dx73L mm with 64 CPR Encoder (Helical Pinion)

This gearmotor is a powerful 12V brushed DC motor with a 131.25:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 8400 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. This gearmotor is also available without an encoder.Key specifications: voltage no-load performance stall extrapolation 12 V 76 RPM, 150 mA 45 kg⋅cm (630 oz⋅in), 5.5 A