Silicon nitride ceramic bearing 6204CE XINGRUIDA bearing supplier

Compared with the properties of four kinds of bearing materials, common bearing steel AISI52100(GCR15) , stainless steel AISI440(9Cr18) , silicon nitride (Si3N4) and Zirconia (ZRO2) , ceramic bearing is an important mechanical base component, because of its excellent performance which can not be compared with metal bearing, high temperature resistance, super strength and so on in the new material world Clueless. In the past ten years, it has been widely used in various fields of national economy and people's livelihood. Ceramic bearing has high temperature resistance, cold resistance, wear resistance, corrosion resistance, magneto-electric insulation, oil-free self-lubrication, high speed and other characteristics. It can be used in extremely harsh environment and special working conditions. It can be widely used in the fields of aviation, aerospace, navigation, petroleum, chemical industry, automobile, electronic equipment, metallurgy, electric power, textile, pumps, medical instruments, scientific research and national defense and military affairs, is a new material application of high-tech products. Ceramic bearing rings and rolling body using all ceramic materials, Zirconia (ZRO2) , silicon nitride (Si3N4) , silicon carbide (Sic) three kinds. The retainer is made of polytetrafluoroethylene, Nylon 66, polyetherimide, zirconium oxide, silicon nitride, stainless steel or special aviation aluminum, thus expanding the application of ceramic bearings. First, because ceramics are almost corrosion-resistant, ceramic ball bearings are suitable for working in harsh conditions with corrosive media. Second, since the ceramic ball has a lower density than steel and is much lighter in weight, the Centrifugal Force on the outer ring can be reduced by 40% during rotation, thus greatly extending its service life. Third, ceramics are less affected by heat expansion and cold contraction than steel, so when the bearing clearance is fixed, the bearing can be allowed to work in the environment with more drastic temperature difference. Fourthly, because the elastic modulus of ceramics is higher than that of steel, it is not easy to deform when subjected to force, so it is beneficial to improve working speed and achieve higher precision.