Company News
Types and scrap standards of common spreader.
Release time：2021-06-30
The hook is a common accessory in the spreader. The hook has two forms: single hook and double hook.
1. Single hook is a kind of commonly used hook with simple structure and convenient use. The material is generally made of 20 # carbon steel or 20Mn forging, and the maximum lifting weight is not more than 80 tons.
2, when the lifting weight is large, the use of double hooks, the force is uniform and symmetrical. Material is generally made of 20 # carbon steel or 20Mn forging, usually more than 80 tons of lifting equipment are made of double hooks. The stack hook is made of several pieces of steel plate which are cut and formed by riveting. Because the hook plate will not break at the same time, the reliability of the hook is better than that of the whole forging hook. The disadvantage is that the deadweight and the size are larger.
1. Single hook is a kind of commonly used hook with simple structure and convenient use. The material is generally made of 20 # carbon steel or 20Mn forging, and the maximum lifting weight is not more than 80 tons.
2, when the lifting weight is large, the use of double hooks, the force is uniform and symmetrical. Material is generally made of 20 # carbon steel or 20Mn forging, usually more than 80 tons of lifting equipment are made of double hooks. The stack hook is made of several pieces of steel plate which are cut and formed by riveting. Because the hook plate will not break at the same time, the reliability of the hook is better than that of the whole forging hook. The disadvantage is that the deadweight and the size are larger.
When the hook appears the following to be scrapped: the hook has a crack; The dangerous section wear up to 10% of the original size; Openness is increased by 15% compared with the original size; Torsional deformation exceeds 10 degrees; Plastic deformation of dangerous section or hook neck.
