All ceramic bearing rings and balls are made of ceramic material. Hybrid ceramic bearings are composed of bearing steel rings and ceramic balls. Ceramic materials: silicon nitride (Si3N4), zirconia (ZRO2), silicon carbide Carbide (Sic), composite ceramic bearing.
Divided by structure: Ceramic bearings can be divided into: ceramic bearings with zirconia tape holder, ceramic bearings with silicon nitride tape holder, ceramic bearings with composite tape holder. General ceramic bearing retainer material is polytetrafluoroethylene (PTFE) as a standard configuration, glass fiber reinforced nylon 66 (GRPA66-25), special engineering plastics (PEEK, PI), stainless steel (SUS316, SUS304), Brass (Cu), etc. Due to the problems of pocket processing and forming technology, ceramic material cages are still rarely used. Due to the material restrictions of the cages, special cages have been developed for zirconia full-ball bearings and silicon nitride full-balls for special applications. Full ceramic bearings and composite full ball ceramic bearings.
According to the completeness of the material: The main components of the ceramic bearings mentioned above are mostly ceramic materials, which are defined as ceramic bearings. If the inner and outer rings and rolling elements of the bearing are not made of ceramic materials, we It is defined as a hybrid ceramic bearing. The more widely used in hybrid ceramic bearings is that the ball uses ceramic materials called ceramic ball bearings, which can be divided into zirconia ceramic ball bearings and silicon nitride ceramic ball bearings.
Ceramic bearing characteristics:
Accuracy grades: ABEC-1, ABEC-3, ABEC-5, ABEC-7, ABEC-9. Usually abec5 grade starts, including abec7 and abec9 are called high-precision bearings. In addition, some customers still care about the grade of ceramic balls. Generally, the grade of ceramic balls is divided into G3, G5, G10, G16. The smaller the value, the higher the accuracy. Bearing size: We can provide miniature ceramic bearings with a minimum inner diameter of 2mm, as well as large ceramic bearings with an inner diameter of 400mm. We can supply ceramic bearings in inch and metric sizes. Sealing form: In general, all-ceramic bearings are open without seals, but we can provide all-ceramic bearings with PTFE seals.
Advantages of ceramic bearings:
High-speed bearings. Especially for hybrid ceramic bearings, the maximum speed can reach 450,000RPM, which is mainly used in the field of dental handpieces and spindles. High temperature resistant ceramic bearings. The highest temperature to endure is 1200 degrees Celsius. Anti-corrosion. The material itself has special corrosion resistance. This can be applied to strong acids, alkalis, inorganic, organic salts, seawater, etc. Application areas: electroplating equipment, electronic equipment, chemical machinery, shipbuilding, medical equipment ... Magnetic, non-adsorbing dust can reduce bearing wear and noise. Application examples, such as degaussing equipment, precision instruments. Insulation: As high resistance prevents arc damage to the bearing, the bearing can be used in necessary electronic equipment. High vacuum: Since ceramic materials are self-lubricating and oil-free, ceramic bearings can be used in ultra-high vacuum environments.