1) Countersink 2) Countersink bit 3) Metalworking terminology
Found on
https://www.crosswordclues.com/clue/counterbore
A counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. A counterbore hole is typically used when a fastener, such as a socket head cap screw, is required to sit flush with or below the level of a workpiece`s surface. Whereas a counterbore is a flat-bottomed enla....
Found on
http://en.wikipedia.org/wiki/Counterbore
• (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. • (n.) A flat-bottomed cylindrical enlargement of the mo...
Found on
http://thinkexist.com/dictionary/meaning/counterbore/
(v) To enlarge a hole to a given depth. (n) 1. The cylindrical enlargement of the end of a drilled or bored hole. 2. A cutting tool for counterboring, having a piloted end of the size of the drilled hole.
Found on
http://www.encyclo.co.uk/local/21038
A concentric diametric enlargement of a hole for part of its depth which forms an angular, radial or flat surface at the bottom
Found on
http://www.encyclo.co.uk/local/21059
Coun'ter·bore` noun 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-bottom...
Found on
http://www.encyclo.co.uk/webster/C/171
Coun`ter·bore' transitive verb To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.
Found on
http://www.encyclo.co.uk/webster/C/171
[
n] - a bit for enlarging the upper part of a hole
Found on
http://www.webdictionary.co.uk/definition.php?query=counterbore
To enlarge the top part of a hole to specific size, as for the head of a socket-head or cap screw. Also the tool that is used.
Found on
https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
countersink noun a bit for enlarging the upper part of a hole
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.
