... within 260 centi-grade4. (Outer, inner ring and ball with ceramic Si3N4 material, no cage) the temperature will attainability ... steel with ceramic ball bearing:1. (Outer, inner ring with stainless steel and ball with ceramic Si3N4 material, the cage with Still ... PEEK,PTFE,UPE,and ball with ceramic ZrO2 ball,Si3N4 ball, glass ball and stainless steel ball material ,the cage with PTFE)the temperature ...