The lifting capacity of a screw jack is undoubtedly the core indicator for measuring its performance. During the lifting operation of the jack, the transmission thread is like a "strongman" shouldering a heavy responsibility, bearing all the work load alone. You see, the larger the working face, the heavier the burden on this' strongman ', and the higher the degree of force it bears. So, those large tonnage jacks are like muscular "strongmen" with a naturally larger appearance and body shape.

In the precise "small world" of the screw jack, the working life of the threaded pair transmission plays a crucial role. It not only determines the service life of the jack, but also has a decisive impact on its load-bearing capacity and the time it can maintain its load-bearing capacity. The thread material, tooth profile, and number of thread heads are like the key building blocks for constructing this "small world" and are essential components of thread pair transmission. It is worth mentioning that the processing technology requirements for these components are extremely strict, with demands for shape and positional accuracy reaching a level of nitpicking.

For a screw jack that pursues stable work and has self-locking function, the requirements for thread quality are very high. In order for the jack to maintain a stable state like a steady "guardian" for a long time after lifting heavy objects, we must ensure that the thread profile of the jack is full and round, like a carefully carved artwork. At the same time, the surface of the connecting sleeve must be as smooth as new, and there must be no cracks, as if they were a "crack of life". The internal threads on the surface area must not be careless, and there must be no serious rust or any other visible defects. Only in this way can the jack maintain excellent performance during operation.