The crane eye hooks are generally forged single hooks. The cast hooks are not allowed on the crane. The crane eye hooks are widely made of low carbon steel and carbon alloy steel.
Hooks are used to connect cranes and heavy objects, and their maintenance must be valued. For this reason, when the lifting height limiter or the hook locking device of the hook is broken or damaged, it is absolutely not allowed to be used again; as for the unlicensed employment, the leadership responsibility shall be investigated.
In order to ensure safety, the hooks shall be inspected and shall be scrapped when one of the following conditions is found.
1 crack occurred.
2 The wear amount of the dangerous section is not more than 5% of the original height according to the hook manufactured by GBl0051.2; the hook manufactured according to the industry standard shall be greater than 10% of the original size.
3 opening degree increased by 15% than the original.
4 Torsional deformation exceeds 10 degrees.
5 Plastic deformation of the dangerous section or the hook neck.
When the wear of the 6-plate hook bushing reaches 50% of the original size, the core sleeve should be scrapped.
When the 7-plate hook mandrel wear amount reaches 5% of the original size, the mandrel should be scrapped.