Qingdao Haosail Machinery Co., Ltd.

DIN766 Standard Link Chain Features:

• High-strength material, excellent load-bearing. 42CrMo alloy steel is selected, with a carbon content of 0.38% - 0.45%, chromium of 0.9% - 1.2%, and molybdenum of 0.15% - 0.25%. After quenching and tempering, the tensile strength reaches 1000 - 1200MPa, and the yield strength is ≥850MPa. For example, the breaking load of a 10-ton chain exceeds 50 tons. The chain ring is formed by forging technology, with a dense internal structure and no defects such as pores and sand holes. It is not easy to deform or break when subjected to heavy load impact, and is suitable for heavy-load material transportation scenarios such as mines and ports.

• Precise manufacturing, stable transmission. Strictly produced in accordance with DIN766 standards, the chain ring diameter is 12 - 30mm, the pitch is 30 - 80mm, and the pitch tolerance is controlled at ±0.3mm (±0.5mm for ordinary heavy-duty chains). Taking a 20mm diameter chain as an example, the ring length is 50mm, the ring width is 25mm, the aspect ratio is 2.0, the meshing with the sprocket is precise, the runout is ≤1mm during operation, and it can remain stable even at high speed (linear speed can reach 3m/s), reducing equipment vibration and noise, and improving transportation efficiency and stability. Welding adopts submerged arc automatic welding, the weld is full, and the strength is higher than the parent material, ensuring that the chain link connection is firm.

• Special treatment, adapt to harsh environment. The surface quenching hardening layer has a depth of 0.8-1.2mm and a hardness of HRC55-60. The wear resistance is 40% higher than that of ordinary chains. Under conditions of frequent material friction, the service life is extended by 2-3 times. For humid and corrosive environments, the zinc layer thickness of hot-dip galvanizing treatment is ≥80μm, and the salt spray resistance test exceeds 1000 hours; the nickel layer thickness of nickel plating treatment is ≥20μm, with excellent corrosion resistance, which can be used in seaside ports, chemical raw material transportation and other scenes.

• Various specifications, wide adaptability. We provide a variety of specifications and models, from light 5-ton to heavy 50-ton, to meet the needs of different industries. The shape and size of the chain link can be customized to adapt to various non-standard equipment. For example, the large pitch chain customized for mines can be matched with specially designed scraper conveyors, increasing the coal conveying capacity by 20% - 30% and reducing the equipment failure rate.

DIN766 Standard Link Chain Typical Applications:

• Mining. Underground coal mines use 20-30 ton DIN766 chains for scraper conveyors. They run 18-20 hours a day in harsh environments such as coal slime and gangue, and continuously transport coal. The high-strength chain can withstand the impact of large pieces of coal gangue, and the wear-resistant surface reduces chain link wear. The downtime caused by chain failure is controlled within 30 hours per year, ensuring efficient production in coal mines. Ore hoists in metal mines use 40-50 ton chains to lift underground ore to the ground. The safe and reliable load-bearing capacity ensures smooth lifting operations.

• Port Logistics. Large cargo lifting equipment in ports, such as the lifting mechanism of container gantry cranes, uses 10-20 ton chains to frequently lift containers (each weighing 20-30 tons). The high-precision pitch of the chain ensures a smooth lifting process, and the special surface treatment makes it adaptable to the high salt spray environment at the seaside. The annual maintenance frequency is reduced by 3-4 times compared with ordinary chains, which improves the port operation efficiency. The belt conveyor at the bulk cargo terminal uses 15-30 ton chain to pull the conveyor belt to transport bulk cargo such as coal and ore. The stable transmission performance ensures continuous material transportation.

• Construction. The lifting chain of the high-rise construction elevator mostly uses 10-15 ton DIN766 chain, which carries construction personnel and materials, has a high safety factor, and ensures construction safety. In the aggregate conveying system of the large concrete mixing plant, the chain drives the hopper to lift sand and gravel aggregates. The high strength and wear resistance meet the needs of frequent operations, ensuring the continuous production of the mixing plant, and the amount of aggregate conveyed per hour can reach 50-100 tons.