Full ceramic(All-ceramic) bearing OF ZRO2 &SI3N4 material Full ceramic bearing have excellence performance as special electrical and magnetism resistance, ... and specially condition. The rings and balls made by full ceramic material:ZrO2 and SI3N4, as a standard constructure,the cage made ... with GFRPA66-25,PEEK,PI,AISI SUS304,SUS316,Cu,et Ceramic Bearings