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With the current popularity of finish hard turning, the need for improved productivity and tool life is of significant importance to manufacturers. The present work explores the effects of cryogenic coolants in machining hardened materials, from an industrial perspective, with emphasis on productivity and tool life improvement, environmental effects, as well as reliable performance characteristics for brittle tools. Both alumina ceramic (Al 2 O 3 ) and polycrystalline cubic boron nitride (PCBN)doi:10.1115/imece2003-42232 fatcat:dy2evo7ldndtrkvzt7leqfru7e