Counterbore

Definition of Counterbore

Coun`ter`bore´   Pronunciation: koun`t?r-b?r´
n.1.A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
2.A kind of pin drill with the cutting edge or edges normal to the axis; - used for enlarging a hole, or for forming a flat-bottomed recess at its mouth.
v. t.1.To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

Related Words

bit, countersink, countersink bit
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