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:
“There is something so settled and stodgy about turning a great romance into next of kin on an emergency room form, and something so soothing and special, too.”
—Anna Quindlen (b. 1952)
“Then turning to the disciples, Jesus said to them privately, “Blessed are the eyes that see what you see! For I tell you that many prophets and kings desired to see what you see, but did not see it, and to hear what you hear, but did not hear it.””
—Bible: New Testament, Luke 10:23,24.
“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)