China OEM 2020 Newest RV Series Worm Gear Box supplier

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 Alloy 3. Worm Shaft:  20Cr Steel, carburizing, quenching, grinding, surface hardness...