Ceramic bearing

As an important mechanical basic part, ceramic bearing has excellent performance that can not be compared with metal bearing, and its high-temperature resistance and super strength are leading in the new material world. In the past ten years, it has been widely used in various fields of national economy and people's livelihood. First, because ceramics are hardly afraid of corrosion, ceramic rolling bearings are suitable for working under harsh conditions filled with corrosive media. Second, because the density of ceramic rolling balls is lower than that of steel and the weight is much lighter, the centrifugal effect on the outer ring during rotation can be reduced by 40%, and the service life can be greatly extended. Third, ceramic is less affected by thermal expansion and contraction than steel. Therefore, when the bearing clearance is fixed, the bearing can be allowed to work in an environment where the temperature difference changes greatly. Fourth, because the elastic modulus of ceramic is higher than that of steel, it is not easy to deform under stress, so it is conducive to improving the working speed and achieving high accuracy. Ceramic bearings have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, magnetoelectric insulation, oil-free self lubrication, high speed and so on. It can be used in extremely harsh environment and special working conditions. It can be widely used in aviation, aerospace, navigation, petroleum, chemical industry, automobile, electronic equipment, metallurgy, electric power, textile, pumps, medical devices, scientific research, national defense and military and other fields. It is a high-tech product for the application of new materials. The ferrules and rolling elements of ceramic bearings are made of all ceramic materials, including zirconia (ZrO2), silicon nitride (Si3N4) and silicon carbide (SIC). The retainer is made of polytetrafluoroethylene, nylon 66, polyether imide, zirconia, silicon nitride, stainless steel or special aviation aluminum, so as to expand the application of ceramic bearings.