ZrO2 Zirconia Full Ceramic Ball Bearings Open 6700 6701 6702 6703 6704 to 6708
Material: ZrO2 Zirconia，The ferrule and rolling ball are made of zirconia (zRO2) ceramic material, and the retainer is made of polytetrafluoroethylene (PTFE) 。. Ceramic bearings belong to self-lubricating bearings, and there is no need to add lubricating grease.