As we all know, the internal structure of the jack is complex and precise, and any damage to any part will affect the normal operation of the whole system. As the saying goes, "a careless move will lose everything".

The jack is driven by manpower through the screw pair, and the screw or nut sleeve is used as the jacking part. When the pinion rotates, a pair of bevel gears operate together to drive the screw to rotate and push the lifting sleeve, so that the weight rises or falls. When the jack is raised to the high point, the entire internal system bears the maximum pressure within the load. If it is in this state for a long time, a series of structures such as internal gear threads are receiving a constant loss process. Over time, the performance of the jack will inevitably decline, and then the service life will be greatly reduced.

Therefore, after the jack is used, remember to return the sleeve at the first time, and never keep the jack under high load for a long time