High Torque, Low-Power Consumption. Worm Options: Single Worm & Double Worm. Dynamic Options: Electric Motor & Hydraulic Pump. Applications: machinery, solar tracker,etc. Material : CK50 QT;42CrMo4V. Quality warranty:2 years. Certificate: TS16949,DNV. Packing:Antirust Oil+rubberized fabric+free of fumigation box(no solid wood). Production Period : 7 days or 30 Days. We produce Slew ring,Slew drive,undercarriage parts for heavy machinery. Mini Combine Harvester,Mini Tiller,Generator,Engine,Water Pump,Fire Pump, Atomizing Pump and Farming Cultivation Accessory for agriculture. Advantages: Meet the complex and harsh environment fully. Durable. All Seasons. Competitive Price.