Aug 06, 2021 CBN, which stands for Cubic Boron Nitride, has revolutionized the machining sector ever since it’s invention. While you upgrade your conventional grinding wheels like vitrified Al 2 O 3 or ceramic wheel to vitrified CBN, or vit-CBN, there are a few major points you should keep in mind.. Depending on your grinding machine, it might be made to handle both conventional as well as vitrified CBN