Compression coil spring

Specification: 12.8*125*360
Number of coils: 6.25
Weight: 2.283 kg

55020-9Y402 is an automotive coil spring, and is formed by winding high-performance steel wires 60Si2Mn or 55SiCrA with temper stability and strong hardenability. It is of a cylindrical helical structure and belongs to cold-pressed springs. The core performance of this spring lies in elastic deformation: it compresses to store energy under force and automatically returns to its original shape when the force is removed. The coil spring serves as a key component for “buffering, energy storage, and automatic reset” in mechanical systems. After undergoing heavy-pressure treatment, its hardness can be increased to 44-50 HRC, complying with the national standard GB/T 2089-2009.
This coil spring has a simple structure, low cost, and stable elasticity. It can precisely control vehicle movement and achieve buffering and shock absorption. The outer surface of the spring is provided with a high-quality epoxy resin or polyurethane coating, which provides resistance to chemical corrosion. The color is customizable, and the spring has high hardness and corrosion resistance, making it suitable for use on various road conditions, such as bumpy roads, potholed road surfaces, rough mountain roads, muddy surfaces, and waterlogged road surfaces.
Typically, a coil spring can be used for 8 to 10 years or for more than 150,000 kilometers. If a vehicle is frequently driven under harsh road conditions, such as frequent travel on bumpy or potholed road surfaces, frequent overloading, sudden acceleration/braking, or long-term exposure to high-temperature, high-humidity environments with corrosive substances, the spring’s service life may be shortened, and it may need to be replaced after 3 to 5 years.
To extend the service life of the coil spring, it is recommended to: regularly inspect the spring’s condition to check for signs of deformation, rust, or breakage; avoid vehicle overloading; minimize driving on harsh road conditions as much as possible; and keep the vehicle clean to prevent corrosive substances from adhering to the spring.