It depends on what industry equipment it is used in. The processing equipment adopts 440 material because of its high hardness and good wear resistance. 304 material is suitable for seawater ships and industries with serious corrosiveness.
Stainless steel bearings can organize mass production and achieve high strength and precision. It can be used for all kinds of products that are easy to rust and strongly corrode, and has a wide range of applications. Medical instruments, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery.