... Configuration: worm shaft,worm gear,ball bearing,oil seal,housing and ball screw 1.Model: RNK-0. ... 20T2.Configuration: worm shaft,worm gear,ball bearing,oil seal,housing and ball screw3.Static loading: 0.5T ~ ... balls to roll between the nut and lifting ball screw. This creates significantly less friction than ... with frequently lifting and precise positioning.11.Ball screw jack stand loading capacity is 1/ ...