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　　Cranes are things that lift materials and play a good role in daily transfer of heavy objects. Hooks are one of the important components of cranes. There are also demands for hook varieties. How should we choose?

　　1. The hooks of the crane are divided into single hooks and double grooves. Single hooks are mainly used for lighter objects, and double hooks 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.

　　Cranes are things that lift materials and play a good role in daily transfer of heavy objects. Hooks are one of the important components of cranes. There are also demands for hook varieties. How should we choose?

　　1. The hooks of the crane are divided into single hooks and double grooves. Single hooks are mainly used for lighter objects, and double hooks 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.