Electric worm gear screw jacks (also known as a electric screw jack, a motorized screw jack, a motor driven screw jack, or a electrically operated screw jack) is used in many fields where it is necessary to lift different loads, such as automated production lines for sheet metal machinery, packaging, textiles, plastics, food, renewable energy and more. Electric machine screw jacks have precisely positioning and self-locking feature for no creeping down without brake mechanism or locking systems. Important Note: ball screw jacks are self-lowering without self-locking. Brake motors are required to stopping and precise positioning the load for electric ball screw jacks. If the motor frequency will be varied to provide a soft start, an inverter duty brake motor may be required. Motor types: three phase induction motor, single phase induction motor, geared motor, stepper motor, servomotor, worm gear motor reducer, air motor or hydraulic motor, dc motor and dc geared motor. All standard motors are 3-phase, 220-380 VAC, 50hz, 1450 rpm. Single phase motors are 220 VAC, 50hz, 1450 rpm. Load capacities of electric screw jacks: 0.5 ton, 1 ton, 2 ton, 3 ton, 5 ton, 10 ton, 15 ton, 20 ton, 30 ton capacity models. About electric worm gear screw jacks 2D Autocad dwg, dxf assembly drawings, and 3D stp, step, model, igs, prt or catpart assembly drawings, please contact us directly.