Product Description Detailed Photos       Product Description Components:1. Housing: Die-cast Aluminium Alloy Gearbox (RV571~RV090)Cast Iron Gearbox (RV110~RV150)2. Worm Wheel: Wearable Tin Bronze Alloy, Aluminum Bronze Alloy3. Worm Shaft: 20Cr Steel, carburizing, quenching, grinding, surface hardness 56-62HRC, 0.3-0.5mm remaining carburizedlayer after precise grinding4. Input Configurations:Equipped with Electric Motors (AC Motor, Brake Motor, DC Motor, … Continue reading China high quality Nmrv Series Hollow Shaft Worm Reducer for Machines