Stainless steel ball bearings are also called stainless steel bearings or stainless bearings. Compared with ordinary ball bearing with chrome steel, Stainless steel ball bearings can keep from corrosion caused by some acids or moisture,and stainless steel ball bearings have obvious advantages of stable operation, low noise, low magnet, wide application, excellent anti-corrosion and anti-rust properties.  But stainless steel ball bearings are more difficult and strict than ordinary bearings in technology and precision control. They can be widely used in the fields of medical equipment, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, food processing machinery etcs. Runstar is a professional stainless steel ball bearings manufacturer in china since 2007,certified ISO9001:2015.Usually, there are 440(9Cr18),420(9Cr13) for choice in Runstar, 316 is sometimes available for special application.