... , Heavy Duty, Uniform Lifting Speed, Low Efficiency, Use Infrequentl worm screw liftConfiguration: Worm Gear, Worm Shaft, Taper Roll Bearings, Seals, Housing, Self-locking Trapezoidal ... Nut,Steel Cover,Rubber Belllows,Limit Switches,Couplings,Flexible Linking Shaft,Trunnion Base,etc.* Application Industries: Machinery,Metallurgy,Construction, Irrigation,Chemical ...