TetraformR is a patented group of concepts which can be used to produce extremely high static stiffness and dynamic stiffness structures. A prototype machine tool, called Tetraform 1, has successfully demonstrated the concepts' advantages by grinding optical glasses and quartz to optical quality, at relatively high stock removal rates. The concepts, exampled by these grinding results, may be as applicable to high-speed and heavy machining as to ultra-precision and precision optical machining.
"Tetraform grinding", Proc. SPIE 1573, Commercial Applications of Precision Manufacturing at the Sub-Micron Level, (1 April 1992); doi: 10.1117/12.57751; https://doi.org/10.1117/12.57751