Worm Gear electric ball screw jack, anti-Rotation and Worm Gear Jack higher 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 the lack of friction, a keeping brake is essential: a electric motor brake or a springtime pressure brake is necessary.
These worm equipment screw jacks are very 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 total of 11 sizes can be found, each in a traveling nut version and a simple version.
The screw jacks can be used separately or in groups connected with drive shafts, joints, couplings, bevel gearboxes and additional mechanical components. In addition they could be driven by different motors: electrical, with either AC motor or DC motor in addition to hydraulic or pneumatic motors. Each one of 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 basic, robust and inexpensive. The proportion of screw jacks that make use of ball screws is nevertheless constantly increasing. The reason why for this are mainly their pitch precision, their high efficiency (much less power consumption and much less heat generation) and the bigger 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 combined with the screw shaft. The lifting screw will not slide. It is similar to the linear actuator functioning principle which converts rotational movement into linear motion. From this stage to understand, a power linear actuator can be 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 task. Compared with acme screw, the ball screw is certainly more efficient as there are ball bearings between the nut and screw. The anti-friction ball bearing can increase the ball screw efficiency.