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7
High-Speed Machining
7.1 Introduction
High-speed machining (HSM) or high-speed cutting (HSC), for a given mate-
rial, is dened as the cutting speed above which shear localization develops
completely in the primary shear zone. It is preferable to dene machining
speeds quantitatively in terms of specic ranges. One suggestion is that
600–1,800 m/min should be termed as HSM, 1,800–18,000 m/min very HSM,
and >18,000 m/min as ultra-HSM. In case of very difcult-to-machine mate-
rials, it is preferable to use the term high-throughput machining rather than
HSM in order to maintain a proper focus on realistic machining conditions.
HSM nds many industr ...