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 efficiently than various other machine screw actuators
No self-locking! Because of the lack of friction, a keeping brake is necessary: a electric motor brake or a springtime pressure brake is necessary.
These worm gear screw jacks are extremely precision and reliability, it could meet all of the necessary safety, cost-efficiency, and durability mandates of your application. High power bronze worm gear is used, the payloads from 0.5T to 100T . A total of 11 sizes are available, each in a touring nut version and a simple version.
The screw jacks can be utilized separately or in organizations connected with drive shafts, joints, couplings, bevel gearboxes and various other mechanical components. In addition they could be powered by different motors: electrical, with either AC engine or DC motor along with hydraulic or pneumatic motors. All these motion control items can be built in many type jacking system arrangements or configurations.
Ball screw jacks are normal where higher speeds and duty Worm Gear Jack 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 nevertheless constantly increasing. The reasons for this are mainly their pitch accuracy, their high efficiency (less power consumption and much less heat generation) and the higher pitches offered, which permit higher stroke speeds.
A screw jack can truly add a machine cut lifting nut. For this model screw jack, just the bronze nut move together with the screw shaft. The 
lifting screw will not slide. It is like the linear actuator working principle which converts rotational motion into linear motion. From this point to understand, an electric linear actuator can be a motorized screw jack.
The screw thread of screw jack can 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 project. Weighed against acme screw, the ball screw is certainly better as there are ball bearings between your nut and screw. The anti-friction ball bearing can increase the ball screw efficiency.