... Configuration: worm and worm gear,bearing,housing and ball screw3.Ball screw jack assemblies use small balls to roll between the ... precise positioning.5.Ball screw jack stand loading capacity is 1/3 Lead screw jack loading capacity.6.Ball screw jack is more ... Wheel, Inverter, Limited Switches, Linking Shaft, Coupling, Pillow Block Bearing, Counter, Bevel Gearbox, Swivel Plate and Trunnion Base.Features ...