Turning is a machining process in which a rotating workpiece is shaped by a stationary cutting tool, typically on a lathe, to produce cylindrical or flat surfaces. This method, involving operations such as boring, facing, and grooving, is essential in manufacturing. Authors like Freiherr von E. Spiegel and Denman W.
Ross have examined the concept metaphorically, employing "turning" to illustrate dynamic movement or design equilibrium, while others, such as Joseph Brackett, viewed it as a symbolic path toward harmony. These diverse perspectives underscore turning’s dual nature—as both a technical procedure and a metaphor for change—linking mechanical accuracy with abstract human experiences.