The lifting sleeve of the jack equipment is marked with a red warning limit line. When the operator lifts the jack and leaks the red warning line, it indicates that the maximum lifting height has been reached and the jack sleeve cannot continue to rise. Otherwise, the jack sleeve will not be able to descend. Claw jacks have two lifting parts, the top and claw parts, which are special types of jacks. So, does the red warning line on claw jacks apply to both the top and claw parts?

Although the top and claw parts of the claw jack are in different positions, one above the lifting sleeve and the other below the lifting sleeve, they share the same lifting sleeve and steel plate when carrying and lifting heavy objects. Therefore, the limit line drawn on the lifting sleeve also applies to the top and claw parts.

In addition, if the red limit line of the claw jack gradually fades due to long-term operation and wear, and cannot serve as a good warning, we can draw a circle with red paint on the original groove area again.