As is known to all, the best screw jacks are made in Japan as it has the edge-cutting techniques and technology in this kind of process. As time goes by, the application of screw jack is becoming more and more popular especially in China in most of the construction projects as it can help to adjust the scaffold’s height.

Until today, processing technology of screw jack China is standing at the front line in the peer industry all over the world.

For most of the screw jacks, in order to minimize the risk of misplacement of the movement system and to ensure the precision, the reinforcement of screw jack rigidity is of great importance. The prior measure to reinforce the rigidity is to increase a factor of pretension on screw jack nuts.

The friction torque will be increased with the addition of pretension, so will the working temperature. Analyzing from this aspect, it is necessary to determine an appropriate value of the pretension to meet the requirements of rigidity and precision as well as obtain an optimized life expectancy and a comparatively lower temperature lifting during the working process.