... , Pushing, Pulling and Rolling Linear Motions. Worm Gear Drive Screw Jack Accessories: Protective Tube, Rubber Bellows, Electric Motor ... , Hand Wheel, Inverter, Limited Switches, Linking Shaft, Coupling, Pillow Block Bearing, Counter, Bevel Gearbox, Swivel ... Device Available. * Special Custom Design Available.Worm Gear Drive Screw Jack Materials: * Lifting Screw: steel C45 (optional ...