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 the lack of friction, a holding brake is essential: a motor brake or a spring pressure brake is necessary.
These worm equipment screw jacks are extremely precision and reliability, it could meet all the necessary security, cost-efficiency, and toughness mandates of your application. High power bronze worm gear is used, the payloads from 0.5T to 100T . A complete 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 groupings linked with drive shafts, joints, couplings, bevel gearboxes and various other mechanical components. In addition they can be powered by different motors: electrical, with either AC motor or DC motor as well as hydraulic or pneumatic motors. All these worm screw jack 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 make use of trapezoidal screws Tr, because they’re simple, robust and inexpensive. The proportion of screw jacks that use ball screws is however constantly increasing. The reasons for this are mainly their pitch precision, their high efficiency (less power consumption and less heat era) and the bigger pitches offered, 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 does not slide. It can be similar to the linear actuator working principle which converts rotational motion into linear motion. From this point to understand, an electric linear actuator is definitely 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 project. Weighed against acme screw, the ball screw is more efficient as there are ball bearings between your nut and screw. The anti-friction ball bearing can raise the ball screw efficiency.