Entry from a textbook
High Speed machining or cutting is defined as the cutting speed above which shear localization develops completely in the primary shear zone.
600 to 1,800 metres/minute is termed HSM.
1,800 to 18,000 metres/minute is termed Very high speed machining
Above 18,000 metres/minute it is termed ultra HSM
In the case of difficult to machine materials, High throughput machining is used.
Fundamentals of Machining Processes: Conventional and Nonconventional Processes, Second Edition
Hassan Abdel-Gawad El-Hofy
CRC Press, 06-Aug-2013 - Technology & Engineering - 562 pages
Google Book link
Generally, the wheel velocity between 30 and 35 m/s is defined as conventional grinding;
The wheel speed exceeding 45 to 50 m/s is defined as high speed grinding;
The wheel speed between 150 and 180 m/s or higher is defined as Super-high Speed Grinding.
Volkswagen Group China applied the high speed grinding technique to grind engine camshafts. The wheel rotation-velocity is 4300 r/min, and 3000 workpieces can be ground each wheel dressing.
High Speed Grinding of Rails
Cecimo Magazine Summer 2011
Cecimo Magazine Winter 2011
New Trends in Production Systems Design and Operation
Trends in Recent Machine Tool Technologies - Dr. Toshimichi Miriwaki - Kobe University
Next Generation Grinding Machines
Updated 25 Mar 2016, 24 Feb 2012