Material classification of ceramic bearings

Zirconia

All ceramic bearings are resistant to magnetic and electrical insulation, wear and corrosion resistance, oil-free self-lubricating, high temperature and high temperature resistance, and can be used in extremely harsh environments and special working conditions. The ferrule and rolling element are made of zirconia (ZrO2) ceramic material, and the retainer is made of polytetrafluoroethylene (PTFE) as standard. Generally, glass fiber reinforced nylon 66 (RPA66-25) and special engineering plastic (PEEK, PI), stainless steel (AISISUS316), brass (Cu), etc.

Silicon nitride

Silicon nitride (Si3N4) ceramic materials are used for silicon nitride all-ceramic bearing rings and rolling elements. RPA66-25, PEEK, PI, and phenolic cloth bakelite tubes are also generally used. Compared to ZrO2, the SiN4 all-ceramic bearing is suitable for higher speed and load capacity, as well as for higher ambient temperatures. At the same time, it can provide precision ceramic bearings for high-speed, high-precision and high-rigidity spindles with the highest manufacturing precision from P4 to UP.

Full ball

Full-ball type all-ceramic bearing with a ball gap on one side, because of the cage-free design, it can load more ceramic balls than the standard structure bearing, thus improving its load capacity, and avoiding the limitation of cage material. It can achieve the corrosion resistance and temperature resistance of ceramic cage type full ceramic bearings. This series of bearings is not suitable for higher speeds. When installing, care should be taken to install the notched surface on the end that does not bear axial load.

mixing

Ceramic balls, especially silicon nitride balls, have low density, high hardness, low friction coefficient, wear resistance, self-lubrication and good rigidity. They are especially suitable for rolling elements of inner and outer rings of high-speed, high-precision and long-life hybrid ceramic ball bearings. For metal). Generally, the inner and outer rings are made of bearing steel (GCr15) or stainless steel (AISI440C), and the ceramic balls can be made of ZrO2, Si3N4, or SiC.