... 20T, 30T, 40T, 50T, 1Motorized Screw Jack. Motorized Screw Jack/Worm Gear Screw Jack/Worm Gear Screw Jack/Model: RN-0.5T, 1T ... 2. Configuration: Worm and worm gear, bearing, housing and lead screw 3. Function: Elevating, Lowering, Pulling, Pressing, Pushing, Rotating 4 ... ton (per set) 7. Accessory: Motor, hand wheel, reducers, rubber Bellows, steel cover, bevel gearbox, Safety nut, frequency-inverter, ...