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　　Hook rotation is related to the following factors:

　　(1) The larger the crane, the higher the lifting height, that is, the longer the wire rope between the top pulley set and the hook, the greater the possibility of the hook rotating;

　　(2) The hook wire rope is wound into an odd match ratio and even match, which makes it easy to rotate the hook, and the number of matching wire ropes passed through is less, so 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 size of the hook assembly and the size of the pulley, the greater the possibility of the hook rotating;

　　(5) The speed of operating the lifting and landing hook is unstable, especially when heavy objects are off the ground, the possibility of the hook rotating increases.

　　After the rotation of the crane hook

　　(2) If the heavy object has been lifted very high from the ground, then you can only find a way to move the hook close to the surrounding buildings.

　　(3) After the hook rotates, the torque in the wire rope should be released. The specific method is: put the hook on the ground, unbutton the fixed end of the wire rope, multiply the number of circles m of the hook rotated by the matching number n of the wire rope as the base k (it can be increased or decreased depending on the actual situation), turn the end of the wire rope to release the torque in the reverse direction of the twisting of the wire rope, and then install the fixed end. Put the boom to the maximum elevation angle, repeat the lifting hook several times to check the effect, and you can repeat the above steps until the hook is stable.

　　Hook rotation is related to the following factors:

　　(1) The larger the crane, the higher the lifting height, that is, the longer the wire rope between the top pulley set and the hook, the greater the possibility of the hook rotating;

　　(2) The hook wire rope is wound into an odd match ratio and even match, which makes it easy to rotate the hook, and the number of matching wire ropes passed through is less, so 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 size of the hook assembly and the size of the pulley, the greater the possibility of the hook rotating;

　　(5) The speed of operating the lifting and landing hook is unstable, especially when heavy objects are off the ground, the possibility of the hook rotating increases.

　　After the rotation of the crane hook

　　(2) If the heavy object has been lifted very high from the ground, then you can only find a way to move the hook close to the surrounding buildings.

　　(3) After the hook rotates, the torque in the wire rope should be released. The specific method is: put the hook on the ground, unbutton the fixed end of the wire rope, multiply the number of circles m of the hook rotated by the matching number n of the wire rope as the base k (it can be increased or decreased depending on the actual situation), turn the end of the wire rope to release the torque in the reverse direction of the twisting of the wire rope, and then install the fixed end. Put the boom to the maximum elevation angle, repeat the lifting hook several times to check the effect, and you can repeat the above steps until the hook is stable.