Bearings
Ceramic bearings are light, electrically insulating, and highly resistant to wear and abrasion. This makes them suitable for environments where normal steel bearings fall short.
Ceramic ball bearings
Material: ceramic (ZrO2)
Lubrication: no, ceramic balls are self-lubricating
Seals: no seals
Dimension order: inner diameter x outer diameter x width
The following picture is an example of 8x22x7mm
==========
Hign-concerned Chemical : None