This standard specifies the basic characteristics and classification of sintered materials whose main component is silicon nitride (hereinafter referred to as silicon nitride materials) used in rolling bearing balls.
JIS R 1669:2006 history
2014JIS R 1669:2014 Fine ceramics -- Fundamental characteristics and classification of silicon nitride materials for rolling bearing balls
2006JIS R 1669:2006 Fine ceramics -- Fundamental characteristics and classification of silicon nitride materials for rolling bearing balls