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Hook rotation often occurs without any warning during equipment hoisting operations. When the hoisting machine lifts a heavy object, the hook rotates, and the wire rope wound between the hook and the pulley group on the top of the boom becomes entangled. The lifted heavy object also rotates with the hook. At this time, it is no longer possible to continue to lift or put down the lifted heavy object.

The rotation of the hook will affect the normal progress of the hoisting operation and seriously threaten the safety of workers and equipment, so it must be avoided. The hook rotation is mainly related to the following factors: 1. The larger the crane, the higher the lifting height, that is, the longer the wire rope between the boom top pulley group and the hook, the greater the possibility of the hook rotating.

2. The hook wire rope is wound into an odd-numbered match to make the hook rotate more easily than an even-numbered match, and the smaller the number of matched wire ropes, the greater the possibility of the hook rotating.

3. The greater the weight a single wire rope bears, the greater the possibility of the hook rotating.

4. The smaller the overall dimensions of the hook components and the size of the pulley, the greater the possibility of the hook rotating.

5. The speed of operating the lifting hook of the crane is unstable, especially when the heavy object is lifted off the ground, the possibility of the hook rotating increases.

Hook rotation often occurs without any warning during equipment hoisting operations. When the hoisting machine lifts a heavy object, the hook rotates, and the wire rope wound between the hook and the pulley group on the top of the boom becomes entangled. The lifted heavy object also rotates with the hook. At this time, it is no longer possible to continue to lift or put down the lifted heavy object.

The rotation of the hook will affect the normal progress of the hoisting operation and seriously threaten the safety of workers and equipment, so it must be avoided. The hook rotation is mainly related to the following factors: 1. The larger the crane, the higher the lifting height, that is, the longer the wire rope between the boom top pulley group and the hook, the greater the possibility of the hook rotating.

2. The hook wire rope is wound into an odd-numbered match to make the hook rotate more easily than an even-numbered match, and the smaller the number of matched wire ropes, the greater the possibility of the hook rotating.

3. The greater the weight a single wire rope bears, the greater the possibility of the hook rotating.

4. The smaller the overall dimensions of the hook components and the size of the pulley, the greater the possibility of the hook rotating.

5. The speed of operating the lifting hook of the crane is unstable, especially when the heavy object is lifted off the ground, the possibility of the hook rotating increases.