Diamond and CBN Vitrified Bonded Wheels There is a great demand for special bonded wheels are harder than both resin and which metal bonded wheels, for the use of automated equipment and systems, which both resin and metal bonded wheels will float suffice. These highly demanded bonded wheels must be durable with extended life and must be self-truing as well as self-dressing. In order to sustain maximum performance over the long period of heavy uses. Vitrified-bond technology is today' s answer. A vitrified bond is actually a ceramic bond. It is extremely hard, yet free cutting, and combines the best features of both resin and metal bonds. It provides a longer tool life, effective grinding, and high productivity, which is desperately sought after in order to provide maximum performance together with minimum maintenance.