lead screw drive system, worm gear drive system, mechanical actuator system structures include bevel gearboxes, screw jacks, electric motor, gear reducer, hand wheel, pillow block bearing, jaw couplings and line shaftings. Compared to fast speed hydraulic lifting system and pneumatic lifting system, screw jack lift system is not only for the simple load-supporting from several kilograms to heavy duty several hundreds tons, but also have many advantages such as self-locking without brake or locking mechanism, precisely positioning, full synchronization, manual operated or electric motor driven, multiple screw jacks arrangments, easy installation and operation, maintenance free.

Efficiency

Two screw jack lift system, "L", I and T configuration,, transmission efficiency 95% 

Three screw jack lift system, I and T configuration, transmission efficiency 90%

Four screw jack lift system, H, U and T configuration, transmission efficiency 85%

Six screw jack lift system, 2H and U configuration, transmission efficiency 80%

Eight screw jack lift system, 2H and H configuration, transmission efficiency 80%

Notes: don't ignore bevel gearbox efficiency 98%

Application

Application in theatre stage lifts, sheet steel and steel pipes production lines, coil sheet slitter lines, paint coating lines, rewinding lines, pickling lines, cut to length lines, continuous hot dip galvanizing lines, spray infeed conveyor lift systems, wood working machines, plastics processing machines, textile machines, assembly equipment in the automobile and aircraft industries, food and beverage production equipments, packaging machines, adjusting synchronous coil feed lines rolls, feeder levelers and railway maintenance lifting platform.

Note: several independent motorized screw jack together constitute a screw jack lift system, considering full synchronization, if power source is three phase asynchronous motor, must be controlled with PLC (Programmable Logic Controller). Or use servo motor driven screw jacks.