Pololu 10:1 Metal Gearmotor 37Dx50L mm 12V (Helical Pinion)

This gearmotor is a powerful brushed DC motor with 10:1 metal gearbox intended for operation at 12 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. This gearmotor is also available with an integrated encoder.Key specifications:Voltage: 12VNo load performance: 1000 RPM, 200 mAStall extrapolation: 4.9 kg⋅cm (68 oz⋅in), 5.5 AExact gear ratio: ``(25×40) / (10×10) = bb(10:1)``