Worm screw jack reducer components include bronze worm gear,trapezoidal screw,worm shaft,taper roll bearing, Specifications* Worm Screw Jack * Load Capacity: 2.5KN-500KN ... Load Capacity2.5KN to 500KN As StandardTravel Stroke10 MM ~ 6500 MMScrew TypeTranslating Screw, Keyed Screw, Rotating Screw ConfigurationsSelf-Locking Trapezoidal Screw,Worm Gear,Worm Shaft ...