Precision moulds and machine manufacturer / supplier in China, offering Dpr35 Series Planetary Gearbox Gear Ratio 20: 1 Backlash 20 Arc-Min for NEMA 14 Stepper Motor, Dpr42 Planetary Gearbox Gear Ratio 20: 1 Backlash 20arc-Min for NEMA 17 Stepper Motor, 85mm Frameless BLDC Motor 48V 1750rpm 2.56nm 470W 11.5A and so on.