As a typical representative of mechanical jacks, the screw jack has a highly representative mechanical transmission method. The transmission method of the screw jack adopts the screw pair transmission, which is very different from hydraulic transmission. The screw jack rotates through the meshing between gears, and then transmits to the screw, and then effectively lifts by increasing the torque. So, what are the biggest advantages of the screw pair transmission of the screw jack compared to the hydraulic transmission of the hydraulic jack?

We need to first understand the hydraulic transmission of hydraulic jacks. Hydraulic transmission uses the flow of hydraulic oil to generate pressure and push the sleeve up. It is more suitable for short-term lifting operations and cannot bear excessive weight for a long time. Spiral jacks have strong pressure holding capacity and can act under heavy objects for a long time. They not only provide simple support, but also provide long-term support. From this point of view, they have stronger endurance and are more durable.

Spiral jacks rely on their own characteristics to have stronger load capacity, so bridge jacks are more commonly used for long-term support operations in bridge repair projects.