"CBN" blanks and inserts consist of a layer of polycrystaline CUBIC BORON NITRIDE and a cemented tungsten carbide substrate produced as an integral blank by a high-pressure/high-temperature process. The result is a cutting tool product that has the hardness and wear resistance of a cubic boron nitride complemented by the strength and impact resistance of cemented tungsten carbide. Cubic boron nitride, next to diamond, is the hardest material known to man.
"CBN" blanks, because of their unique physical properties, do not react chemically with most metals, nor will they oxidize at machining temperatures below 1000-C. The cutting edge of a "CBN" blank tool stays hard and sharp under severe and extremely hot machining conditions that would normally weaken or soften conventional cutting tool materials.
"CBN" blanks and inserts are engineered specifically for machining high temperature alloys and hardened ferrous materials, such as tool and alloy steels, and chilled cast iron. The inserts are designed to be used in standard type tool holders, while "CBN" blanks are intended to be brazed to either steel tool shanks or carbide indexable type inserts and then ground to desired tool geometries.