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.
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Famous quotes containing the word turning:
“Great is your faithfulness, O God, Creator,
with you no shadow of turning we see.
You do not change, your compassions they fail not;
all of your goodness forever will be.”
—Thomas O. Chisholm (1866–1960)
“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)
“We are living in a demented world. And we know it. It would not come as a surprise to anyone if tomorrow the madness gave way to a frenzy which would leave our poor Europe in a state of distracted stupor, with engines still turning and flags streaming in the breeze, but with the spirit gone.”
—Johan Huizinga (1872–1945)