... , 20T, 30T, 40T, 50T, 1Motorized Screw Jack. Motorized Screw Jack/Worm Gear Screw Jack/Worm Gear Screw Jack/Model: RN-0.5T, 1T, 2T ... , steel cover, bevel gearbox, Safety nut, frequency-inverter, brake, trunnion base, limit switches, coupling, link shafting. 8. Application: Machinery, metallurgy, construction ...