... 10T,15T,20T2.Configuration: worm shaft,worm gear,ball bearing,oil seal,housing and ball screw3.Static loading: 0.5T ~20T.4.Dynamic ... assemblies use small balls to roll between the nut and lifting ball screw. This creates significantly less friction than worm gear ... suitable to mechanical transmission place with frequently lifting and precise positioning.11.Ball screw jack stand loading capacity is 1/3 ...