As a typical representative of mechanical jacks, the transmission mode of screw jacks is highly representative, which adopts screw pair transmission, which is significantly different from the hydraulic transmission of hydraulic jacks. Specifically, the screw jack transmits power to the screw through gear meshing and rotation, and then achieves lifting operations by increasing torque. So, compared to hydraulic transmission, where is the biggest advantage of the screw pair transmission of the screw jack reflected?

To answer this question, let's first understand the hydraulic transmission principle of a hydraulic jack: it generates pressure through the flow of hydraulic oil, pushing the sleeve up to complete the lifting. This transmission method is more suitable for short-term lifting operations and cannot withstand excessive weight for a long time.

The screw jack, on the other hand, relies on its extremely strong pressure holding ability to stably act under heavy objects for a long time. It not only provides simple support functions, but also meets the need for long-term sustained support, demonstrating more endurance.

It is precisely this core characteristic that gives the screw jack a stronger load capacity. Therefore, in bridge repair projects and other operations that require long-term support, screw jacks have become a more suitable choice.