... dynamic load 26 ton Self-lock trapezoidal screw worm gear screw jack traveling screw detailed informations:1.Model:RN-0. ... ,pushing,pulling and rolling movements3.Self locking trapezoidal screw,heavy duty,precision accuracy,low efficiency,use infrequently4.Arrangement ... Tunnel freezer systems,Oven lifters,Vacuum furnace lid lifters,Conveyor lifts,Air dampers,Theatre stages,Glass charging machines, ...