Heavy Duty Agricultural Leaf Spring for Tractor Trailer – High Strength Auto Parts Suspension Spring for Combine Harvester
This product is a high-quality auxiliary leaf spring designed specifically for modern agricultural machinery. It is a core elastic element in the suspension and cushioning systems of agricultural tractors, harvesters, seeders, and field transport equipment. It is precision rolled from high-performance spring steel (such as 60Si2Mn, 50CrVA, etc.), possessing excellent fatigue strength, high elastic limit, and excellent weather resistance. It can maintain stable mechanical properties over a long period of time under harsh field operating environments with high frequency, heavy load, and large impact.
The product structure offers various leaf spring combinations, including constant cross-section, variable cross-section, and parabolic, tailored to the installation space and stress requirements of different agricultural implements. Each leaf spring is tightly fitted together with a central bolt and return clamp. The surface is treated with stress shot blasting, reinforced shot peening, and an anti-corrosion coating (epoxy primer + polyurethane topcoat), effectively eliminating early micro-cracks and improving corrosion resistance and stone impact resistance. The optimized end structure ensures smooth movement of the leaf spring during compression and rebound, reducing inter-leaf friction and abnormal noise.
In terms of performance, the leaf spring can efficiently absorb the impact energy from ground undulations, sudden load changes and operating resistance, significantly reducing the vibration transmission to the frame and cab, thereby protecting precision hydraulic components, transmission system and sensors, and extending the service life of the whole machine.
Its stable support ensures that agricultural implements maintain the set working depth and level posture even under complex terrain conditions, improving the uniformity and efficiency of sowing, tilling, and harvesting. Compared to rubber or polyurethane buffers, metal leaf springs are heat-resistant, oil-resistant, and ozone-resistant. They exhibit minimal stiffness changes within a temperature range of -40°C to 120°C, are not prone to permanent deformation, and have a failure warning capability (slow crack propagation), facilitating routine inspections.
Our product range covers original equipment manufacturer (OEM) replacement sizes for major agricultural machinery brands (John Deere, Case New Holland, Kubota, YTO Group, etc.), and we also offer custom-made products to meet specific load, arc height, and stiffness requirements. Each batch undergoes 100% flaw detection and bench fatigue testing (≥200,000 cycles without breakage), and a test report is provided. Installation is convenient, with direct bolt fixing, and maintenance is infrequent (simply apply lubricant periodically). Choosing these leaf springs is like replacing the "shock-absorbing spine" of your agricultural machinery, ensuring efficient operation in all weather conditions.
