Silicon nitride all-ceramic bearing rings and rolling elements are made of silicon nitride (si3n4) ceramic material, and the holder is made of PTFE (ptfe) as standard. Rpa66-25, peek, pi, and phenolic clips are also generally used. Cloth bakelite pipe, etc. Compared to zro2, the sin4 all-ceramic bearing is suitable for higher speeds and load capacities, 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.