In the hoisting scheme, is it necessary to subtract the weight of the hook, rigging and rope buckle of the crane according to the working radius and the length of the main arm?

The weight of hooks, rigging and rope buckles is so small that it can be ignored. If it is necessary to use a large special lifting tool, its weight should be considered for reference only.

Crane users need high-quality steel wire rope, which should have long service life, high stability and reliability. Fretting fatigue is the main reason for the failure of steel wire ropes used in atmospheric environment. At present, the phosphating coated steel wire rope produced by patented technology is the first fretting fatigue prevention measure in the field of steel wire rope in the world and the most advanced technology in the field of steel wire rope in the world. After manganese phosphating or zinc-manganese treatment, the wear resistance and corrosion resistance of wire rope surface are improved in an all-round way, and the fatigue life of wire rope is greatly improved because it is not easy to wear and corrosion. The fatigue life is 3-4 times that of smooth steel wire rope with the same structure (under comparable conditions in laboratory), which can be verified by fatigue test. If you have your own fatigue testing machine, you can do a comparative test yourself. This test result is the most credible. The service life of wire rope is proportional to the fatigue life, and the service life is also extended in the same proportion. According to the approximate price of wire rope market, the price of manganese phosphating coated wire rope is higher than that of smooth wire rope. However, the extension of service life is much higher than the price increase, so the daily average use cost of phosphating coated steel wire rope is only 30-45% of that of smooth steel wire rope, which is lower in use cost and higher in cost performance. .

Phosphate coated steel wire rope has longer service life, lower use cost and better stability than smooth steel wire rope. Phosphating steel wire rope is produced by patented technology. Because it is in short supply, it is difficult to buy it at present, so it is necessary to ask the wire rope manufacturer more. Please note that the name of wire rope, such as phosphating wire rope, must be indicated on the purchase invoice to prevent illegal enterprises from infringing their legitimate rights and interests. In addition, patented products are generally painted with patent numbers on the outer packaging of wire ropes. The warranty shall include the main technical indicators such as the type and weight of phosphating film (phosphating film has a great influence on the service life of wire rope, such as wear resistance and corrosion resistance, etc.) for reference only.