Worm Gear electric ball screw jack, anti-Rotation and higher worm screw jack pitches available
Translating(traveling screw) and rotating (traveling nut) configurations
Move loads and apply force more effectively than additional machine screw actuators
No self-locking! Due to having less friction, a holding brake is essential: a motor brake or a springtime pressure brake is necessary.
These worm gear screw jacks are very precision and reliability, it could meet all the necessary basic safety, cost-efficiency, and durability mandates of the application. High strength bronze worm gear is used, the payloads from 0.5T to 100T . A total of 11 sizes can be found, each in a traveling nut version and a basic version.
The screw jacks can be used separately or in groups connected with drive shafts, joints, couplings, bevel gearboxes and various other mechanical components. In addition they could be powered by different motors: electric, with either AC engine or DC motor along with hydraulic or pneumatic motors. Each one of these motion control products can be built in many type jacking program arrangements or configurations.
Ball screw jacks are normal where higher speeds and duty cycles are needed. Most screw jacks make use of trapezoidal screws Tr, because they’re simple, robust and inexpensive. The proportion of screw jacks that make use of ball screws is however constantly increasing. The reasons for this are mainly their pitch precision, their high efficiency (less power consumption and much less heat era) and the higher pitches offered, which permit higher stroke speeds.
A screw jack can add a machine cut lifting nut. Because of this model screw jack, only the bronze nut move combined with the screw shaft. The lifting screw will not slide. It is definitely like the linear actuator operating basic principle which converts rotational movement into linear motion. Out of this stage to understand, a power linear actuator is a motorized screw jack.
The screw thread of screw jack could be acme screw and ball screw. So are there few variants of the screw jack. Commonly, machine screw jack 
and ball screw jack are available in your engineer project. Weighed against acme screw, the ball screw is more efficient as there are ball bearings between your nut and screw. The anti-friction ball bearing can boost the ball screw efficiency.