Our automotive chain can be classified into four kinds: silent chain¡¢roller chain¡¢bush chain and Hy-Vo chain according to its structure ,which widely used in engine¡¢transmission gear and power driving system etc. At present, the main pitch range is 6.35-12.7mm. The chain is adopted high quality alloy steel material and special heat treatment technology, strictly conforming with ISO/TS 16949 quality system which offers acceptable products and service for main automotive manufacturers. Our automotive chain has advantages of high precision¡¢high strength¡¢high wear resistance and high fatigue performance.