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Cracks or deformation : Check the hook surface, hook neck, threads and other parts for cracks, bends or plastic deformation.

Wear : Measure the hook opening (compare with the original size, if it exceeds 10% , it should be scrapped).

Corrosion : Check for rust or corrosion, especially paying attention to the stress-bearing parts (if the cross-section wear caused by rust is ≥ 5%, it needs to be replaced).

Clear markings : Make sure the rated load markings on the hook are clearly readable.

Rotation flexibility : Test whether the hook bearings or rotating parts are stuck to ensure smooth 360° rotation.

Lubrication condition : Check whether lubrication is sufficient and add grease if necessary (according to manufacturer's requirements).

Anti-unhooking device : confirm that the tongue (safety card) is intact, the spring is effective, and it can close automatically and lock reliably.

Nut or locking device : Check whether the hook nut is loose and whether the anti-loosening gasket is ineffective.

Pulley block/crossbeam : Check whether the connecting pins and bolts between the hook and the pulley block and the crossbeam are worn or loose.

Wire rope or chain : Make sure the rope ring and shackle connected to the hook are not deformed, worn or cracked.

No-load test : raise and lower the hook to observe if there is any abnormal noise or jamming.

Load test (regularly): Daily inspection can observe historical records. If hidden dangers are found, a static load test with 1.25 times the rated load is required .

Inspection records : Fill out the inspection form and record any abnormalities (such as cracks, excessive wear, etc.).

Immediate deactivation criteria : Deactivate and replace if the following problems are found:

• cracks or permanent deformation.

• The opening increased by more than 10% .

• The wear of the dangerous section reaches 5% .

Inspection frequency : Inspection is required before each shift, and inspection frequency should be increased after intensive use.

Tool assistance : Use a magnifying glass (to check for cracks) and a caliper (to measure wear) when necessary.

Compliance basis : Refer to the lifting hook standard "GB/T 10051.1-2010".

Cracks or deformation : Check the hook surface, hook neck, threads and other parts for cracks, bends or plastic deformation.

Wear : Measure the hook opening (compare with the original size, if it exceeds 10% , it should be scrapped).

Corrosion : Check for rust or corrosion, especially paying attention to the stress-bearing parts (if the cross-section wear caused by rust is ≥ 5%, it needs to be replaced).

Clear markings : Make sure the rated load markings on the hook are clearly readable.

Rotation flexibility : Test whether the hook bearings or rotating parts are stuck to ensure smooth 360° rotation.

Lubrication condition : Check whether lubrication is sufficient and add grease if necessary (according to manufacturer's requirements).

Anti-unhooking device : confirm that the tongue (safety card) is intact, the spring is effective, and it can close automatically and lock reliably.

Nut or locking device : Check whether the hook nut is loose and whether the anti-loosening gasket is ineffective.

Pulley block/crossbeam : Check whether the connecting pins and bolts between the hook and the pulley block and the crossbeam are worn or loose.

Wire rope or chain : Make sure the rope ring and shackle connected to the hook are not deformed, worn or cracked.

No-load test : raise and lower the hook to observe if there is any abnormal noise or jamming.

Load test (regularly): Daily inspection can observe historical records. If hidden dangers are found, a static load test with 1.25 times the rated load is required .

Inspection records : Fill out the inspection form and record any abnormalities (such as cracks, excessive wear, etc.).

Immediate deactivation criteria : Deactivate and replace if the following problems are found:

• cracks or permanent deformation.

• The opening increased by more than 10% .

• The wear of the dangerous section reaches 5% .

Inspection frequency : Inspection is required before each shift, and inspection frequency should be increased after intensive use.

Tool assistance : Use a magnifying glass (to check for cracks) and a caliper (to measure wear) when necessary.

Compliance basis : Refer to the lifting hook standard "GB/T 10051.1-2010".