As an excellent tool for lifting materials, cranes play a crucial role in lifting and transporting heavy objects during human operations. When it comes to lifting objects with a crane, the most important thing is the hook. So, do you really know about hooks? Do you know what types of crane hooks there are? Now let the editor from Shandong Qilide Heavy Industry Group Co., Ltd. explain it to you!

1. Generally speaking, according to their shape, crane hooks can be divided into single hooks and double groove hooks. If it comes to manufacturing methods, they can also be divided into forged hooks and sheet hooks. The single hook is easy to manufacture and use, and is used for lifting lightweight objects; The double groove weighing system has a larger weight and is generally used for lifting heavy objects. Generally, forged single hooks are mainly used for lifting cranes below 30T, while double hooks are used for lifting cranes between 50T and 100T; Single hooks in the form of sheets are used for lifting cranes ranging from 75T to 350T, while double hooks are used for lifting cranes exceeding 100T.

2. Let's take a look at the cross-sectional shape of the hook body. Generally, there are circular, square, trapezoidal, and T-shaped shapes. If analyzed based on the force situation, the "T" shaped section design is more reasonable, but the forging process is also relatively complex; The trapezoidal section is more reasonable in terms of force and easy to forge, while the rectangular (square) section is only used for sheet hooks, and the load-bearing capacity of the section is not fully utilized, making it bulky. The circular section is only used for small hooks.

As for the forging of the tail of the hook, if triangular threads are used, due to the severe stress concentration of this structure, it is easy to break at the crack. Therefore, trapezoidal or serrated threads are often used at the tail of large hooks.