Tongs are mainly used for lifting steel plates because of their unique characteristics, they can clamp steel plates and complete the lifting. If the pliers are used for a long time, they must be properly maintained and scrapped immediately after reaching the scrapping standard. So how should it be maintained? What are the criteria for scrapping?

　　Maintenance of lifting pliers:

　　Hanging pliers and other items, as long as careful care and maintenance, not only the appearance of novel, but also prolong the service life, naturally more cost-effective. Before and after each use, all parts should be checked for abnormalities, such as cracks in the weld of the clamp body. Hole or shaft deformation, rotation part scratches corrosion clamp body damage; If the mark is lost, it should be replaced in time to avoid misuse;

　　After use, the pliers should be cleaned to keep the moving parts and chuck of the pliers free of debris; Add lubricating oil to the pliers regularly to make its performance superior; The lifting tongs should be stored indoors and kept clean, dry and well ventilated to prevent rust.

　　Under any of the following circumstances, the pliers should be replaced or scrapped:

　　When the tooth wear height reaches 10% of the original height;

　　When the wear of clamping shaft is 2.5% of the original diameter;

　　When the overall movement of the clamp body is not flexible, the sliding parts are still invalid after lubricating oil;

　　When the forceps teeth have broken edges or a tooth is broken;

　　The deformation of the forceps shaft or body reaches 1.5% of the original size.

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