Worm Gear electrical 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 other machine screw actuators
No self-locking! Due to having less friction, a keeping brake is necessary: a motor brake or a springtime pressure brake is required.
These worm equipment screw jacks are very precision and reliability, it can meet all of 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 complete of 11 sizes can be found, each in a touring nut version and a basic version.
The screw jacks can be utilized separately or in groupings linked with drive shafts, joints, couplings, bevel gearboxes and various other Worm Gear Jack mechanical components. They also can be driven by different motors: electrical, with either AC motor or DC motor and also hydraulic or pneumatic motors. Each one of these 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’re basic, robust and inexpensive. The proportion of screw jacks that make use of ball screws is however constantly increasing. The reason why for this are mainly their pitch precision, their high efficiency (much less power consumption and much less heat era) and the higher pitches available, which permit higher stroke speeds.
A screw jack 
can add a machine cut lifting nut. For this model screw jack, only the bronze nut move combined with the screw shaft. The lifting screw will not slide. It is certainly similar to the linear actuator operating theory which converts rotational movement into linear motion. From this stage to understand, a power linear actuator is definitely a motorized screw jack.
The screw thread of screw jack could be acme screw and ball screw. So there are few variations 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 better as there are ball bearings between your nut and screw. The anti-friction ball bearing can increase the ball screw efficiency.