... form of multi-input high reliability Worm Screw Jack:(speed reducer,reducer ,gearbox,gesr units) 1. Model: JF-0.5T, 1T, 2T ... , 20T, 30T, 40T, 50T, 100T 2. Configuration: Worm and worm gear, bearing, housing and lead screw 3. Function: Elevating, Lowering, Pulling ... : 0.1 ton to 26 ton (per set) 7. Accessory: Motor, hand wheel, reducers, rubber Bellows, steel cover, bevel gearbox, Safety ...