... Lifting Speed, Low Efficiency, Use Infrequentl worm screw liftConfiguration: Worm Gear, Worm Shaft, Taper Roll Bearings, Seals, Housing, Self-locking Trapezoidal ... /min* Accessories: Bevel Gearbox,Hand Wheel,Electric Motor,Motor Flange,Frequency Inverter,Safety Nut,Steel Cover,Rubber Belllows,Limit Switches,Couplings,Flexible ...