Hoisting Mechanism – Crane Hook Failure and Trouble Shooting

The crane hook is one of the key parts of the crane, and the lifting of the crane requires a large amount of weight to be carried. It must meet relevant requirements in order to allow the operator to be more confident and bold in using, and also to make the work better.

During work, the crane hook is prone to fracture, which can cause casualties and property losses, leading to major accidents. Therefore, in the maintenance of the crane, do not neglect the inspection of the crane hook. See the following table for inspection items:

Name	Failure and damage condition	Reason and Result	Trouble- shooting Method
Forged Hook	Fatigue crack on book surface	Overload, Overtime use, flaw of material	Replace it if any crack found
	Wear of oping and dangerous section	Lessen the rigidity, or it is easy to cause hook break and accident	Replace crane hook when the abrasion over 5% of dangerous section.
	Crack and wending parts have plastic deformation	Caused by long time overload and fatigue	Replace immediately
Laminated hook	The abrasion of pin shaft is more than 3%-5% of nominal diameter	Hook fall off	Replace
	Earring has crack or burr	Earring breakage	Replace
	The abrasion of earring’s lining reaches 5% of original thickness	Bad forced condition	Replace

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Hoisting Mechanism – Crane Hook Failure and Trouble Shooting

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