|Name||silicon nitride bearings|
|Material||The ring and ball are made of silicon nitride, and the ceramic frame is PTFE|
|Feature||The strength of silicon nitride is very high, especially the hot-pressing silicon nitride, which is one of the hardest substances in the world, it is extremely resistant to high temperatures and does not melt into the melt body at 1200°C until decomposing at 1900°C, And silicon nitride has amazing chemical corrosion resistance, can resist almost all inorganic acid and many organic acid corrosion, at the same time it’s a kind of high-performance insulating material.|
Ceramic rolling bearings are suitable for operation under harsh conditions full of corrosive media because ceramics are almost resistant to corrosion.
●long service life
Because the density of ceramic ball is lower than steel, the weight is much lighter, so the centrifugal action of the outer ring can be reduced by 40% when rotating, thus the service life is long
●ess affected by temperature
Ceramics are less affected by thermal expansion and contraction than steel, so when the clearance of the bearing is timed, the bearing can be allowed to work in an environment where the temperature difference changes more violently.
●It is not easy to deform under stress, because the elastic modulus of ceramic is higher than that of steel, so it is beneficial to improve the working speed and achieve higher accuracy.
|Medical instruments, cryogenic engineering, optical instruments, high-speed machine tools, high-speed motors, printing machinery, and food processing machinery, In the aerospace, Marine, nuclear industry, petroleum, chemical industry, textile industry, machinery, metallurgy, electric power, food, locomotive, subway, high-speed machine tools and scientific research and national defense military technology need to be in high temperature, high speed, low temperature, flammable, explosive, corrosive, vacuum, electrical insulation, non-magnetic, dry friction under special conditions such as work, Ceramic bearing is an indispensable substitute role is gradually recognized by people. Along with the advance in processing technology, the craft level is increasing day by day, declining the cost of the ceramic bearing, has been from the past only in some small high, refined, pointed areas within the scope of application, gradually extended to the national economy each industry, product market prices are also gradually close to the practical application, reach the level of user acceptance, the application of ceramic bearing large wave is coming!
Silicon nitride ball ceramic bearings use classification
（1） High-speed bearings: with cold resistance, small mechanical elasticity, pressure resistance, poor thermal conductivity, lightweight, small friction coefficient, and other advantages, can be used in 12000 RPM -75000 RPM high-speed spindle and other high-precision equipment.
（2） High-temperature bearing: the material itself has high-temperature resistance of 1200℃ and good self-lubrication. It does not produce expansion caused by temperature differences in the usage temperature between 100℃-800℃ and can be used in furnaces, plastic, steel, and other high-temperature equipment.
（3） Corrosion-resistant bearings: the material itself has the characteristics of corrosion resistance, and can be used in strong acid, strong alkali, inorganic, organic salt, seawater, and other fields, such as electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment, etc.
（4）Antimagnetic bearing: without magnetic, it does not absorb dust, and can reduce the bearing surface peeling, so as to reduce the operating noise. Available in demagnetization equipment, precision instruments, and other fields.
（5）Electric insulated bearing: due to high resistivity, it can avoid arc damage and can be used in all kinds of power equipment requiring insulation.
（6）Vacuum bearing: due to the unique oil-free self-lubricating property of ceramic material, it can overcome the problem that ordinary bearings cannot be lubricated in the ultra-high vacuum environment.