Definitions for: Counterbore


[n] a bit for enlarging the upper part of a hole



Webster (1913) Definition: Coun"ter*bore` (-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.


Coun`ter*bore" (koun`t?r-b?r"), v. t.
To form a counterbore in, by boring, turning, or drilling; to
enlarge, as a hole, by means of a counterbore.

Synonyms: countersink, countersink bit

See Also: bit

Try our:
Scrabble Word Finder

Scrabble Cheat

Words With Friends Cheat

Hanging With Friends Cheat

Scramble With Friends Cheat

Ruzzle Cheat



Related Resources:
animlas that start with v
r letter animals
animals starting with x