... Jack Models:RNS-15,RNS-25,RNS-50,RNS-90.Worm Gear Bevel Gear Screw Jack Configurations:Protective Tube, Rubber Bellows, ... Counter, Bevel Gearbox, Swivel Plate and Trunnion Base Worm Gear Bevel Gear Screw Jack Features:* Lifting Speed Max 6750 MM/MIN.* ... load. Spiral bevel gears increase strength for higher capacities. Worm Gear Bevel Gear Screw Jack Materials: * Lifting Screw: steel C45 (optional ...