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Counterbore
(redirected from counterbored)

    Also found in: Wikipedia 0.01 sec.
Coun`ter`bore´    (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.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.Counterborecounterbore - a bit for enlarging the upper part of a hole
countersink bit, countersink
bit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit"
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Eighteen such features are supplied in a standard library, including bosses, through holes, countersunk and counterbored holes, and pockets with straight sides or draft angles.
CAD/CAM system is now more powerful, easier to use by Naitove, Matthew H. / Plastics Technology
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