Mining machinery operates for extended periods in harsh conditions such as underground mines and open-pit mining, where it is subjected to heavy impacts, abrasive wear, high dust, high humidity, and exposure to acidic or alkaline media. Locks and pins, as core connection and fastening components, directly affect equipment efficiency, maintenance costs, and operational safety. Long-lasting locks and pins for mining machinery, through specialized material selection, process upgrades, and structural optimization, provide high strength, wear resistance, corrosion resistance, and anti-loosening features. They are designed to withstand the extreme working conditions of mining equipment, significantly extending service life and ensuring continuous, reliable operation.

Long-lasting locks for mining machinery are primarily used on equipment panels, engine covers, hydraulic component covers, and protective doors of mining machines. Their core requirements are extended durability, anti-loosening performance, and corrosion resistance. The lock bodies are made from wear-resistant, corrosion-resistant high-strength alloy steel or stainless steel, with multiple hardening processes such as quenching, carburizing, and tempering. This enhances hardness and toughness, allowing the locks to withstand intense vibrations and material impacts during mining operations without deforming or breaking.

The surface is treated with advanced anti-corrosion and wear-resistant coatings such as galvanization, chrome plating, or Dacromet, forming a dense protective layer that effectively shields against high humidity, dust, and acidic or alkaline media found underground. Structural enhancements include reinforced lock tongues, anti-loosening threads, and sealed designs, combined with dust- and water-proof gaskets. These features prevent accidental loosening from vibration while keeping dust and moisture out, reducing internal wear. Their service life is 4–6 times longer than standard locks, making them ideal for continuous mining machinery operations.

Long-lasting pins are critical load-transferring and positioning components for mining machinery. They are widely used in excavators, crushers, and scraper conveyors at key points such as booms, dipper arms, linkages, and joint connections. Pins are made from high-strength, wear-resistant alloy steel, precisely forged, heat-treated at high temperatures, and machined with precision grinding. With hardness up to HRC50-58, they offer excellent shear resistance, bending strength, and wear resistance, enduring the heavy loads and repeated friction experienced in mining operations without deformation, wear, or breakage.

Pin surfaces are treated with nitriding, wear-resistant chrome plating, or other surface treatments to further improve wear and corrosion resistance, reducing frictional loss with connected components. Dimensions are precisely controlled to ensure a tight fit with mating parts, eliminating clearance movement and preventing additional wear. Some pins feature anti-drop locking structures for added safety. These long-lasting locks and pins undergo strict wear, corrosion, and strength testing, significantly reducing the frequency of replacement for mining machinery parts, minimizing downtime, and lowering maintenance costs. They provide a solid foundation for the safe, efficient, and stable operation of mining equipment.