The screw jack has the power to lift a heavy object weighing thousands of tons, which comes from human labor. However, through the conversion of the internal ratchet and spiral system of the jack, it becomes divine power. This divine power lifts the heavy object to a high place through the lifting sleeve and the top cover on the sleeve. Although the top cover of the jack does not play a role in output, it is still one of the key components for lifting heavy objects.

Firstly, the top cover of the screw jack is made of cast steel material, which has strong load-bearing capacity and is located between the lifting sleeve and the heavy object, without flattening or deformation;

Secondly, there are a circle of threads on the top cover, which play a role in anti slip and prevent heavy objects from falling off or falling off during the lifting process;

In addition, the top cover can help evenly distribute the force or pressure applied by the jack. When the jack applies pressure on the load, the top cover expands the contact area and reduces the pressure concentration on the lifted object, thereby reducing the risk of damage or deformation.

The top cover provides a flat and stable platform for the screw jack to ensure even load distribution, avoid load deflection or overturning, and protect the internal lifting sleeve components.