... Pushing, Pulling and Rolling Linear Motions. Worm Gear Drive Screw Jack Accessories: Protective Tube, Rubber Bellows, Electric Motor, ... , Coupling, Pillow Block Bearing, Counter, Bevel Gearbox, Swivel Plate and Trunnion Base. Worm Gear Drive Screw Jack Features: * ... . * Special Custom Design Available.Worm Gear Drive Screw Jack Materials: * Lifting Screw: steel C45 (optional: stainless steel) * Worm ...