If a CBN (internal) abrasive tool is needed for very low abrasive pressures, then the surface structure must be dressed accordingly. The creation of an open structure, optimum grit projection and outstanding stock-removal properties is determined largely by its system partner, the dressing tool.
It is here where we find the ideal application for vitrified dressing tools. Following decades of experience in the development of vitrified bond systems, Meister has created an optimum range of vitrified vDD tools ("vitrified Diamond Dressers") specifically for dressing purposes.
The bonds which can be used for vitrified diamond tools consist mainly of a group of metal oxides, similar to the CBN-capable bond systems. However the characteristic poor affinity of the diamond with the oxidic ceramic bonds means that the conditions for adequate wetting by the bond/glass melt are much more complex.
For the purpose of vDD technology therefore, grit adhesion has been optimised with a thoughtful selection of synthetic metal oxides and the introduction of a low-temperature consolidation process to the point where the diamond crystal qualities that are needed for successful dressing processes can be wetted and bonded.
The wear resistance of modern vitrified dressing tools allows the precision shaping of abrasive wheel geometries provided there is a straight line contact between the two systems.