... .5KN-500KN * Self Lock Trapezoidal Screw * Long Stroke Max 6500mm * Cubic Housing Worm Screw Jack Features: ModelRNF016, 018, 020 ... Stroke10 MM ~ 6500 MMScrew TypeTranslating Screw, Keyed Screw, Rotating Screw ConfigurationsSelf-Locking Trapezoidal Screw,Worm Gear,Worm Shaft,Taper Roll ... Plate and Trunnion Base etc.NOSEN Only Produce Worm Screw Jack, Spiral Bevel Gearbox Power Transmission Products, We ...