Sumitomo Electric Industries, recently listed for general machining of hardened steel cBN new material "SUMIBORON BN2000".
This is a hardness second only to diamond and cBN powder with adhesive material sintered at high temperature under high pressure freezing of cBN sintered body,booster cables can be used for cutting tool materials for high speed machining automobile parts used in hardened steel and cast iron and so difficult to cut ferrous metals. battery clip New products are not cheap ceramic membrane coating type.