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　　　The hook is a more common pick-up device used in bridge cranes. It bears all the loads of lifting. During use, once the hook is damaged and broken, it is likely to cause major accidents. The reason for the damage and breakage of the hook is that the hook causes cracks, deformation, damage and breakage due to friction and overload. To prevent the hook from malfunctioning, overload lifting is strictly prohibited during use. During the inspection, pay attention to the opening degree of the hook and the wear of dangerous sections. At the same time, the hook must be annealed regularly. Once the hook is found, it must be scrapped according to GB10051-88. Resolutely do not weld the hook. Special equipment managers should check whether the hook can be used according to the requirements of GB10051-88.

　　Hook is one of the important components of the crane, and there are also demands for hook varieties. How should we choose?

　　1. The hooks of cranes are mainly divided into single hooks and double grooves. Single hooks are mainly used for lighter objects, and double grooves are mainly used for heavier objects. Generally, cast single hooks are mainly used to lift cranes below 30T, and double hooks are used to lift cranes of 50T-100T; sheet single hooks are used to lift 75T-350T, and double hooks are used to lift cranes above 100T.

　　2. The shape of the hook is generally round, square, trapezoidal and "T" shape. You can choose according to the stress condition. The "T" cross-section is planned as reasonable, but the casting process is also relatively complex; the trapezoidal cross-section is more reasonable and the casting is simple, while the rectangular (square) cross-section is only used for sheet hooks, and the load bearing of the cross-section cannot be fully utilized and is bulky. The circular cross-section is only used for small hooks.

As for the tail of the hook, if triangular thread is used when casting, the stress of this structure is concentrated and severe and simply cracks at the cracks, trapezoidal or zigzag threads are mostly used at the tail of large hooks.

　　　The hook is a more common pick-up device used in bridge cranes. It bears all the loads of lifting. During use, once the hook is damaged and broken, it is likely to cause major accidents. The reason for the damage and breakage of the hook is that the hook causes cracks, deformation, damage and breakage due to friction and overload. To prevent the hook from malfunctioning, overload lifting is strictly prohibited during use. During the inspection, pay attention to the opening degree of the hook and the wear of dangerous sections. At the same time, the hook must be annealed regularly. Once the hook is found, it must be scrapped according to GB10051-88. Resolutely do not weld the hook. Special equipment managers should check whether the hook can be used according to the requirements of GB10051-88.

　　Hook is one of the important components of the crane, and there are also demands for hook varieties. How should we choose?

　　1. The hooks of cranes are mainly divided into single hooks and double grooves. Single hooks are mainly used for lighter objects, and double grooves are mainly used for heavier objects. Generally, cast single hooks are mainly used to lift cranes below 30T, and double hooks are used to lift cranes of 50T-100T; sheet single hooks are used to lift 75T-350T, and double hooks are used to lift cranes above 100T.

　　2. The shape of the hook is generally round, square, trapezoidal and "T" shape. You can choose according to the stress condition. The "T" cross-section is planned as reasonable, but the casting process is also relatively complex; the trapezoidal cross-section is more reasonable and the casting is simple, while the rectangular (square) cross-section is only used for sheet hooks, and the load bearing of the cross-section cannot be fully utilized and is bulky. The circular cross-section is only used for small hooks.

As for the tail of the hook, if triangular thread is used when casting, the stress of this structure is concentrated and severe and simply cracks at the cracks, trapezoidal or zigzag threads are mostly used at the tail of large hooks.