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Hard Material Cutting

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CIRP Encyclopedia of Production Engineering


Hard cutting; Hard drilling; Hard machining; Hard material machining; Hard material removal; Hard milling; Hard part turning; Hard turning


Cutting hard materials like hardened steel with hardness values exceeding 47 HRC is called hard material cutting. All cutting processes like turning, drilling, milling, broaching, and other processes with geometrically defined cutting edges (as distinct from abrasive processes) comprise this category of production method.

Theory and Application


In the past, hard materials were – unless in need of repair – exclusively processed and brought to the final shape by abrasive processes. The development of appropriate cutting tools, machine tools, and machining strategies through the 1980s and 1990s has enabled the majority of hard materials to be cut, and hard cutting is now established in industry. In particular, tool materials of high hardness and sufficient strength at elevated temperatures were the primary technical...

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Correspondence to Hans Kurt Toenshoff .

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Toenshoff, H.K. (2018). Hard Material Cutting. In: The International Academy for Production (eds) CIRP Encyclopedia of Production Engineering. Springer, Berlin, Heidelberg.

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  • Print ISBN: 978-3-642-35950-7

  • Online ISBN: 978-3-642-35950-7

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