Crane hook is a common device for grabbing and lifting loads used by a hoist or crane. The lifting crane hook is usually equipped with safety latch to ensure the wire rope sling, chain or rope in the proper place of crane hook and ensure the safety. With one or more built-in pulleys, the crane hook group can amplify the lifting force.

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crane hook

Classification of crane hooks
Five strength grades M,P,S,T,V,are classified in accordance with mechanical property. As following chart:

Classification of crane hooks

With different strength grades and working class, lifting capacity of hooks sees the table below.

Crane Hook Working Class-1

Crane Hook Working Class-2

Hooks have single hook and double hooks according to shape.

Model：

MM type, MMDtype, MY type, MYD type are classified according to structure and casting way of single-hook and double-hook workblank. It is recommanded that 006～40 hooks adopt MM type or MMD type, and 10～250 hooks adopt MY type or MYD type. Single- hook and double- hook structure and casting way is claasified into LM type, LMD type, LY type and LYD type.

Types of crane hooks
The hook of the crane is divided into single hook and double hook according to the shape, and into forged hook and laminated hook according to the manufacturing method.

The single hook is easy to manufacture and use, but the stress condition is not good. It is mostly used in workplaces with a lifting capacity of less than 80 tons; The lifting capacity is large, and the double hook with symmetrical force is often used.

The laminated hook is riveted by several cut steel plates. In case of cracks in individual plates, the whole hook will not be damaged, with good safety, but its self weight is large. It is mostly used on cranes with large lifting capacity or lifting molten steel drums. The hook is often impacted during operation and must be made of high-quality carbon steel with good toughness.

Hooks are widely classified, generally including shackles, rings, rings, pear shaped rings, long rings, combined rings, S-hooks, nose hooks, American hooks, sheep horn hooks, eye sliding hooks, ring screws with safety cards, chain shackles. They are unique, novel, high-quality and safe. They are suitable for factories, mines, petroleum, chemical industry and ship terminals.

In order to ensure safety and quality safety factor, the static load reaches 3 times, and the lifting capacity is from 5 tons to 150 tons.

Crane hook type

Why does the crane have two hooks
This is based on the principle of pulley block.

On the premise of a certain crane motor capacity, the more pulley blocks, the greater the lifting capacity, but the slower the lifting speed. In order to adapt to different lifting speeds under different lifting weights, two large and small hooks are set, both of which are operated by one motor. The lifting capacity of the small hook is small, but the lifting speed is fast. The hook is the opposite.

The single hook is easy to manufacture and use, but the stress condition is not good. It is mostly used in workplaces with a lifting capacity of less than 80 tons; The lifting capacity is large, and the double hook with symmetrical force is often used. The laminated hook is riveted by several cut steel plates. In case of cracks in individual plates, the whole hook will not be damaged, with good safety, but its self weight is large. It is mostly used on cranes with large lifting capacity or lifting molten steel drums. The hook is often impacted during operation and must be made of high-quality carbon steel with good toughness. Hooks are widely classified, generally including shackles, rings, rings, pear shaped rings, long rings, combined rings, S-hooks, nose hooks, American hooks, sheep horn hooks, eye sliding hooks, ring screws with safety cards, chain shackles. They are unique, novel, high-quality and safe. They are suitable for factories, mines, petroleum, chemical industry and ship terminals. Ensure safety, quality safety factor, static load up to 3 times. The lifting capacity ranges from 5 tons to 600 tons.

What is crane hook