Using rolling processing, due to the residual compressive stress left on the surface layer, it helps to close small cracks on the surface and hinders the propagation of erosion. Thereby enhancing the surface corrosion resistance and delaying the generation or expansion of fatigue cracks, thus increasing the fatigue strength of the oil cylinder rod. By rolling forming, a cold work hardening layer is formed on the rolling surface, reducing the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the cylinder rod surface and avoiding burns caused by grinding. After rolling, the decrease in surface roughness value can improve the fitting properties. At the same time, it reduces the friction damage to the sealing ring or seal during the movement of the cylinder rod piston, and increases the overall service life of the cylinder.  
Rolling technology is an efficient and high-quality process measure, and now taking the 160mm diameter mirror cutting rolling head (45 seamless steel pipe) as an example to prove the rolling effect. After rolling, the surface roughness of the oil cylinder rod decreased from Ra3.2-6.3um before rolling to Ra0.4-0.8um, the surface hardness of the oil cylinder rod increased by about 30%, and the surface fatigue strength of the oil cylinder rod increased by 25%. The service life of the oil cylinder increases by 2-3 times, and the efficiency of the rolling process is about 15 times higher than that of the grinding process. The above data indicates that the rolling process is efficient and can greatly improve the surface quality of the oil cylinder rod.