Turning

Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tool's axes of movement may be literally a straight line, or they may be along some set of curves or angles, but they are essentially linear (in the nonmathematical sense). Usually the term "turning" is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces (that is, holes, of one kind or another) is called "boring". Thus the phrase "turning and boring" categorizes the larger family of (essentially similar) processes. The cutting of faces on the workpiece (that is, surfaces perpendicular to its rotating axis), whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset.

Famous quotes containing the word turning:

“As I pursued my bodily functions, wanting
Neither fire nor water,
Vibrating to the distant pinch
And turning out the way I am, turning out to greet you.”
—John Ashbery (b. 1927)

“Why do we spend years using up our bodies to nurture our minds with experience and find our minds turning then to our exhausted bodies for solace?”
—Zelda Fitzgerald (1900–1948)

““Really, friend, I can’t let you. You may need them.”
“Not till I shrink, when they’ll be out of style.”
“But really I——I have so many collars.”
“I don’t know who I rather would have have them.
They’re only turning yellow where they are.
But you’re the doctor, as the saying is.
I’ll put the light out. Don’t you wait for me....””
—Robert Frost (1874–1963)