What should you pay attention to when using the screw jack? This is also crucial for us who often use jacks .It enables us to better understand the screw jacks, thus reducing unnecessary troubles during use.

The specific precautions for the screw jack are as follows:

Firstly, always keep the surface of the screw jack clean, regularly check whether the internal structure is intact, make the pinion in the rocker flexible and reliable, and lift the lifting sleeve freely.

Secondly, the friction surface between the lifting sleeve and the housing must be oiled at any time. Other oil filling holes should be lubricated regularly.

Thirdly, in order to take into account the safety in use, the jack should not be overloaded, work with illness, it is not appropriate to use more than one to avoid danger.

Fourthly, The screw jack must be checked regularly, depending on the level of use and the working environment. It is advisable to check if there is a lubricant leak in the housing. If this happens, you need to find and remove the cause and fill the lubricant with the correct level.The lubrication conditions of the threaded spindle must be checked regularly (if necessary, recovery must be made) and the presence of any foreign matter. Safety components must be inspected according to applicable specifications.

The double-section screw structure consists of two screws and two nuts. The diameter of the first-stage screw is larger than that of the second-stage screw. There is a keyway on the first-stage screw, and the inner hole of the worm gear is a through hole with a keyway. When the worm gear rotates counterclockwise, the key structure drives the first-stage screw to rotate. A nut with an internal thread is installed above the turbine and fixed on the top of the box. It cooperates with the thread of the first-stage screw. The screw and the nut produce relative movement, and the screw rises or falls. The second-stage structure is also a combination of a pair of nuts and screws. The secondary nut is connected to the primary screw and rotates and rises and falls with the primary screw. The secondary screw is connected to the user’s equipment. The screw does not rotate, but only rises and falls.

1. The primary and secondary screws have the same axis;
   
2. Compact structure, small size, saving space and cost;
   
3. Reduce the weight of the overall platform, reduce the output power of the drive source, energy saving and environmental protection;
   
4. Double the speed. Compared with a single-section screw, the speed is twice that of a single-section screw at the same input speed;