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 efficiently than other machine screw actuators
No self-locking! Due to having less friction, a keeping brake is necessary: a motor brake or a spring worm screw jack pressure brake is required.
These worm gear screw jacks are extremely precision and reliability, it could meet all of the necessary security, cost-efficiency, and strength mandates of the application. High power bronze worm gear is used, the payloads from 0.5T to 100T . A total of 11 sizes can be found, each in a touring nut version and a simple version.
The screw jacks can be used separately or in groupings connected with drive shafts, joints, couplings, bevel gearboxes and other mechanical components. They also could be driven by different motors: electrical, with either AC engine or DC motor along with hydraulic or pneumatic motors. All these motion control products can be built-in many type jacking system 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 are basic, robust and inexpensive. The proportion of screw jacks that use ball screws is nevertheless constantly increasing. The reasons for this are mainly their pitch accuracy, their high efficiency (less power consumption and less heat generation) and the higher pitches offered, 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 along with the screw shaft. The lifting screw will not slide. It is certainly similar to the linear actuator functioning principle which converts rotational movement into linear motion. Out of this point 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 definitely better as there are ball bearings between the nut and screw. The anti-friction ball bearing can boost the ball screw efficiency.