100:1 Metal Gearmotor 37Dx57L mm with 64 CPR Encoder

This 2.71" × 1.45" × 1.45" gearmotor is a powerful 12V brushed DC motor with a metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to of the gearbox’s output shaft. These units have a 0.61"-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available .Key specs at : 100 RPM and 300 mA free-run, 220 oz-in (16 kg-cm) and 5 A stall.