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 additional machine screw actuators
No self-locking! Due to the lack of friction, a keeping brake is necessary: a motor brake or a spring pressure brake is required.
These worm gear screw jacks are very precision and reliability, it can 
meet all the necessary security, cost-efficiency, and toughness 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 simple version.
The screw jacks can be utilized separately or in organizations linked with drive shafts, joints, couplings, bevel gearboxes and other mechanical components. They also could be powered by different motors: electric, with either AC motor or DC motor as well as hydraulic or pneumatic motors. All these motion control products can 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 make use of trapezoidal screws Tr, because they are simple, robust and inexpensive. The proportion of screw jacks that use ball screws is however worm screw jack constantly increasing. The reasons for this are primarily their pitch precision, their high efficiency (less power consumption and much less heat era) and the higher pitches available, which permit higher stroke speeds.
A screw jack can truly add a machine cut lifting nut. For this model screw jack, only the bronze nut move combined with the screw shaft. The lifting screw does not slide. It is definitely similar to the linear actuator operating basic principle which converts rotational motion into linear motion. Out of this stage to understand, a power linear actuator is a motorized screw jack.
The screw thread of screw jack can be acme screw and ball screw. So there are few variants of the screw jack. Commonly, machine screw jack and ball screw jack can be found in your engineer project. Compared with acme screw, the ball screw is definitely better as there are ball bearings between the nut and screw. The anti-friction ball bearing can raise the ball screw efficiency.