Qingdao Haosail Machinery Co., Ltd.

NACM90 Standard Link Chain Features：

• Material technology, suitable working conditions. 45# medium carbon steel or 16Mn low alloy structural steel is selected, and the chain ring is precisely formed by hot forging process, with dense internal structure and Rockwell hardness maintained at HRC35-40. After quenching and tempering, the comprehensive mechanical properties of the chain ring are improved, and the impact toughness αk≥50J/cm² can withstand a certain degree of impact load. Taking the 5-ton chain as an example, in the test of simulating 500 lifting cycles (load is rated value), the chain ring wear is ≤0.15mm, showing good wear resistance and fatigue resistance, meeting the needs of daily and short-term overload operations. The breaking load is more than 4 times the rated load (such as the breaking load of the 8-ton chain ≥32 tons).

• Precise specifications, equipment compatibility. The chain ring diameter and pitch are strictly set according to the NACM90 standard. Common chain ring diameters are 8mm, 10mm, 12mm, 14mm, and 16mm, and the pitches correspond to 40mm, 50mm, 60mm, 70mm, and 80mm, respectively. This precise specification system can be seamlessly connected with many lifting and transmission equipment that are compatible with the NACM standard in the United States and internationally. For example, in a small crane system in logistics warehousing, a NACM90 chain with a specific pitch can precisely mesh with the driving sprocket of the crane to achieve efficient and stable material lifting.

• Convenient connection, flexible assembly. Equipped with a quick connection device that meets the NACM standard, the connection method is simple and reliable, and skilled workers can complete the connection operation within 30 seconds. The breaking strength of the connection device is equivalent to that of the chain ring, ensuring the reliability of the connection part during the operation. The chain can be assembled into different lengths of 5-30 meters through the connecting device according to actual needs to meet the requirements of different lifting heights, equipment layouts and operating ranges. At the construction site, the chain length can be flexibly adjusted to cooperate with small cranes to lift construction materials.

• Excellent cost performance, economical and practical. Compared with the higher-grade NACM96 standard chain, the procurement cost of NACM90 standard chain is 15%-25% lower, which is more suitable for operating scenarios with limited budgets but certain requirements for chain performance and moderate lifting frequency (8-15 times a day). Under normal maintenance conditions, the service life can reach 4-6 years, and the average annual maintenance cost accounts for 10%-15% of the procurement cost (quarterly cleaning + annual flaw detection). After long-term use, the overall cost-effectiveness advantage is obvious.

NACM90 Standard Link Chain Typical Applications:

• Logistics and warehousing scenarios. In logistics warehouses, 3-8 ton NACM90 standard chains are used in conjunction with forklift attachments to transport palletized goods (such as home appliances, daily necessities, etc.). The chain can firmly bind the cargo pallets and work in conjunction with the lifting and handling actions of the forklift to achieve rapid loading, unloading and stacking. In some automated warehousing systems, NACM90 chains are used as transmission components of conveyor lines to drive the flow of goods between different storage areas, with a daily operation volume of up to 60-80 times, ensuring the operation of logistics warehousing efficiently and stably.

• Construction assistance. At construction sites, small cranes often use 5-10 ton NACM90 standard chains to lift building materials, such as lightweight blocks and small prefabricated components. The high strength and flexibility of the chain enable it to quickly complete lifting and transportation tasks in complex construction environments. When building temporary scaffolding, NACM90 chains can be used to hang small tool baskets, providing convenience for high-altitude workers and ensuring the safety of tool basket hanging.

• Small equipment installation and maintenance. In the factory workshop, when installing or maintaining small equipment of 0.5-5 tons (such as small machine tools, ventilation equipment, etc.), NACM90 standard chains can be used with tools such as manual hoists and small cranes to achieve precise displacement and installation of equipment. The chain can flexibly surround the equipment, find the center of gravity, and ensure the stability of the equipment during the lifting process. In the maintenance workshop, NACM90 chains are used to temporarily fix the parts of the equipment to be repaired, which is convenient for maintenance personnel to carry out maintenance operations.

• Agricultural and horticultural operations. In agricultural production, when a tractor pulls a 3-8 ton agricultural trailer to transport agricultural products (such as grain and vegetables), the NACM90 standard chain can be used to connect the trailer and the tractor to transmit traction. Its good toughness can adapt to the small impact caused by uneven road surfaces in the field. In orchard and garden operations, NACM90 chains are used in conjunction with small lifting equipment to move pruned fruit tree branches, garden landscape stones, etc., to improve work efficiency.