Spiral jacks and hydraulic jacks are both lifting devices, with many similarities and differences. These differences are almost reflected in their working principles, because spiral jacks are mechanical jacks that mainly rely on the transmission of internal components such as ratchet and pawl to achieve force amplification, and their lifting ability is relatively stable.

Hydraulic jacks are completely different. Inside a hydraulic jack, there are not too many mechanical devices, and the important component is the hydraulic system. However, the stability of the hydraulic system is poor. As time passes and the quality of the oil cylinder varies, there will be varying degrees of oil leakage. Once the oil leaks, the jack is like a deflated tool, with insufficient upward lifting force, and in severe cases, there may be unfavorable situations such as downward descent.

Therefore, from this perspective, the safety factor of the screw jack is higher than that of the hydraulic jack. In addition, from the perspective of usage, the screw jack can be used both horizontally and vertically, with a more comprehensive lifting function.