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counterbore - Meaning and Examples

Meaning of 'counterbore' (Webster Dictionary)

1 . Counterbore [ n.]
- A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
- 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.
2 . Counterbore [ v. t.]
- To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

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