... is more suitable to mechanical transmission place with frequent lifting and precise positioning.5.Ball screw jack stand loading ... , Pillow Block Bearing, Counter, Bevel Gearbox, Swivel Plate and Trunnion Base.Features: * Top End: Top Plate,Clevis End ... backlash Nut Device Available.* Special Custom Design Available.Materials: * Lifting Screw: steel C45 (optional: stainless steel)* Worm Gear: phosphor ...