Worm Gear electric ball screw jack, anti-Rotation and higher pitches available
Translating(traveling screw) and rotating (traveling nut) configurations
Move loads and apply force more effectively than various other machine screw actuators
No self-locking! Due to the lack of friction, a keeping brake is necessary: a motor brake or a springtime pressure brake is necessary.
These worm gear screw jacks are extremely precision and reliability, it can meet all of the necessary safety, cost-efficiency, and sturdiness mandates of the application. High strength bronze worm gear can be used, the payloads from 0.5T to 100T . A complete of 11 sizes can be found, each in a journeying nut version and a basic version.
The screw jacks can be used separately or in organizations linked with drive shafts, joints, couplings, bevel gearboxes and various other mechanical components. They also can be powered by different motors: electric, with either AC motor or DC motor and also hydraulic or pneumatic motors. Each one of these Worm Gear Jack motion control items could be built in many type jacking system arrangements or configurations.
Ball screw jacks are common where higher speeds and duty cycles are needed. Most screw jacks use trapezoidal screws Tr, because they are simple, robust and inexpensive. The proportion of screw jacks that use ball screws is however constantly increasing. The reason why for this are primarily their pitch accuracy, their high efficiency (less power consumption and less heat generation) and the higher pitches obtainable, which 
permit higher stroke speeds.
A screw jack can truly 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 does not slide. It can be similar to the linear actuator working principle which converts rotational motion into linear motion. Out of this point to understand, an electric linear actuator can be a motorized screw jack.
The screw thread of screw jack could be acme screw and ball screw. So there are few variants of the screw jack. Commonly, machine screw jack and ball screw jack are available in your engineer task. Compared with acme screw, the ball screw can be better as there are ball bearings between the nut and screw. The anti-friction ball bearing can boost the ball screw efficiency.