... Mainly used for machining quartz crystal tungsten , carbide ,ceramics, glass, composite ,sapphire, ferrite, refractory ,thermal spraying material and ... used for machining nonmetals with high rigidity like ceramics ,glass ,tungsten carbide ,ferrite and so on . Electroplated CBN ... outer galvanizing methods are used for dressing vitrified CBN grinding wheel s and internal mounted .Its features are high ...