QINGDAO YINGJICHUANG HARDWARE MACHINERY CO.,LTD.

1.Crack;

2.The wear of the dangerous section reaches 10% of the original size;

3.The opening is increased by 15% compared with the original size;

4.The torsional deformation exceeds 10°;

5.The dangerous section or the neck of the hook produces plastic deformation;

6.When the wear of the hook bushing reaches 50% of the original size, the bushing should be scrapped;

7.When the wear of the hook mandrel reaches 50% of the original size, the mandrel should be scrapped.

1.Crack;

2.The wear of the dangerous section reaches 10% of the original size;

3.The opening is increased by 15% compared with the original size;

4.The torsional deformation exceeds 10°;

5.The dangerous section or the neck of the hook produces plastic deformation;

6.When the wear of the hook bushing reaches 50% of the original size, the bushing should be scrapped;

7.When the wear of the hook mandrel reaches 50% of the original size, the mandrel should be scrapped.

1.Crack;

2.The wear of the dangerous section reaches 10% of the original size;

3.The opening is increased by 15% compared with the original size;

4.The torsional deformation exceeds 10°;

5.The dangerous section or the neck of the hook produces plastic deformation;

6.When the wear of the hook bushing reaches 50% of the original size, the bushing should be scrapped;

7.When the wear of the hook mandrel reaches 50% of the original size, the mandrel should be scrapped.

1.Crack;

2.The wear of the dangerous section reaches 10% of the original size;

3.The opening is increased by 15% compared with the original size;

4.The torsional deformation exceeds 10°;

5.The dangerous section or the neck of the hook produces plastic deformation;

6.When the wear of the hook bushing reaches 50% of the original size, the bushing should be scrapped;

7.When the wear of the hook mandrel reaches 50% of the original size, the mandrel should be scrapped.