Centre
A center punch is used to mark the centre of a point. It is usually used to mark the centre of a hole when drilling holes. A drill bit has the tendency to "wander" if it does not start in a recess. A centre punch forms a large enough dimple to "guide" the tip of the drill bit. When drilling larger holes, and the web of the drill is wider than the indentation produced by a centre punch, the drilling of a pilot hole is usually needed.
An automatic centre punch operates without the need for a hammer.
Read more about this topic: Punch (tool)
Famous quotes containing the word centre:
“To make our idea of morality centre on forbidden acts is to defile the imagination and to introduce into our judgments of our fellow-men a secret element of gusto.”
—Robert Louis Stevenson (1850–1894)
“A toddling little girl is a centre of common feeling which makes the most dissimilar people understand each other.”
—George Eliot [Mary Ann (or Marian)
“Belief and love,—a believing love will relieve us of a vast load of care. O my brothers, God exists. There is a soul at the centre of nature, and over the will of every man, so that none of us can wrong the universe.”
—Ralph Waldo Emerson (1803–1882)