Excavators and cranes are core equipment in construction projects. Excavators handle heavy digging and loading tasks, while cranes are responsible for lifting and transporting heavy loads. Both operate long-term in harsh outdoor conditions, including high dust, humidity, corrosion, and strong impact. Locks and pins, as critical connecting and positioning components, directly affect structural stability, operational precision, and safety. Precision-fit locks and pins for excavators and cranes are designed and manufactured according to equipment-specific specifications, combining high strength, excellent fit, and anti-loosening features, providing reliable support for long-term stable operation.

Precision locks for these machines are custom-designed according to functional requirements of each equipment part. They are primarily used for excavator cabin doors, hydraulic component covers, operator cabin locks, and crane boom connections, control cabinet doors, and protective panels. The locks are made of high-strength alloy steel or 304 stainless steel, heat-treated and carburized to enhance strength and toughness. Precision CNC machining ensures dimensional tolerances within ±0.01mm, providing perfect alignment with mounting points and avoiding assembly gaps that could lead to looseness or jamming.

The surfaces feature precision chrome plating, Dacromet, or other anti-corrosion and wear-resistant treatments, forming a dense protective layer that effectively blocks dust, rainwater, and oil contamination, preventing rust and sticking in harsh outdoor conditions. Structurally, anti-loosening threads and interlocking mechanisms are incorporated, paired with waterproof and dustproof seals, resisting excavator vibration and crane load impacts, preventing accidental loosening while keeping debris out of the lock body. This ensures long service life while maintaining precision and durability.

Precision pins are the core load-bearing and positioning components for both types of equipment. Excavator components such as booms, dipper arms, and linkage joints, as well as crane components like boom hinges and bracket connections, rely on precision pins for load transfer and accurate positioning. Pins are made of high-strength alloy structural steel, precisely forged, heat-treated at high temperatures, and ground to tight tolerances. Surface roughness is controlled below Ra0.8, and dimensional precision strictly matches connection points, fitting tightly with no gaps to minimize movement and wear during operation.

Pins have a hardness of HRC48–58, with excellent shear and bending resistance, able to withstand heavy digging loads of excavators and rated lifting loads of cranes without deformation or breakage. Surfaces undergo precision nitriding or wear-resistant plating, further improving corrosion and wear resistance, suitable for dusty and humid working conditions. These precision locks and pins undergo rigorous accuracy and strength testing, significantly reducing replacement frequency of wear parts, minimizing downtime, and ensuring continuous operations. They provide exact fit and reliable performance for excavators and cranes operating under severe conditions.