... reducer components include bronze worm gear,trapezoidal screw,worm shaft,taper roll bearing, Specifications* Worm Screw Jack * Load Capacity: 2 ... Keyed Screw, Rotating Screw ConfigurationsSelf-Locking Trapezoidal Screw,Worm Gear,Worm Shaft,Taper Roll Bearing,Housing,Grease Oil Sealing etc ... Plate and Trunnion Base etc.NOSEN Only Produce Worm Screw Jack, Spiral Bevel Gearbox Power Transmission Products ...