The scrapped standards of crane hook

Crane Hooks should be scrapped when one of the following conditions occurs:

Crack

② dangerous section wear up to 10% of the original size;

③ opening degree than the original size increased by 10%;

④ crane hook body torsion deformation of more than 10 °;

⑤ crane hook dangerous section or crane hook neck plastic deformation;

⑥ crane hook thread is corroded;

⑦ sheet bushing wear 50% of the original size, the replacement of the bushing;

⑧ sheet crane hook mandrel wear up to 5% of the original size, should replace the mandrel.