A bit for enlarging the upper part of a hole
A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
Noun
a bit for enlarging the upper part of a hole
n.
A flat-bottomed cylindrical enlargement of the mouth
of a hole, usually of slight depth, as for receiving a cylindrical
screw head.
n.
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.
To form a counterbore in, by boring, turning, or
drilling; to enlarge, as a hole, by means of a counterbore.
Counterbore
Counterbore
A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head.
To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.
Usage Examples
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