... 40T,RN-50T,RN-100T2.Function: precisely controlled lifting,lowering,pushing,pulling and rolling movements3.Self locking ... Wheel, Inverter, Limited Switches, Linking Shaft, Coupling, Pillow Block Bearing, Counter, Bevel Gearbox, Swivel Plate and Trunnion Base. ... backlash Nut Device Available.* Special Custom Design Available.Materials: * Lifting Screw: steel C45 (optional: stainless steel)* Worm Gear: ...