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Definition of Countersink
1. Noun. A hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface.
2. Verb. Insert (a nail or screw below the surface, as into a countersink).
3. Noun. A bit for enlarging the upper part of a hole.
Definition of Countersink
1. v. t. To chamfer or form a depression around the top of (a hole in wood, metal, etc.) for the reception of the head of a screw or bolt below the surface, either wholly or in part; as, to countersink a hole for a screw.
2. n. An enlargement of the upper part of a hole, forming a cavity or depression for receiving the head of a screw or bolt.
Definition of Countersink
1. Noun. a conical recess, typically machined around a hole to admit a screw so that it sits flush with a surface. ¹
2. Verb. (transitive) to create such a conical recess. ¹
¹ Source: wiktionary.com
Definition of Countersink
1. [v -SUNK, -SINKING, -SINKS]
Lexicographical Neighbors of Countersink
Literary usage of Countersink
Below you will find example usage of this term as found in modern and/or classical literature:
1. Text-book of Advanced Machine Work: Prepared for Students in Technical by Robert Henry Smith (1919)
"At end A drill and countersink are one piece, while at end Ba hole is made in
countersink and a center drill inserted and held bya set screw. Fio. 20. ..."
2. The American Machinist Shop Note Book: A Collection of Articles by E.A. Suverkrop (1919)
"GRINDING A countersink IN CHILLED CASTINGS The casting shown enlarged in Fig.
... For certain reasons it was not feasible to make the countersink a part of ..."
3. A Practical Dictionary of the English and German Languages by Felix Flügel (1874)
"... T. «) to set into a groove, put in, fix ; to «lie er trim in; to mortise; 6)
Mech. to countersink ; c) to imbed, ..."
4. Cyclopedia of Modern Shop Practice: A Manual of Shop Practice, Pattern edited by Howard Monroe Raymond (1904)
"If the countersink or hole, whose circumference is indi- Fig. 167. cated by the
circle C, is exactly concentric with the outer circle BBBB, then the drill ..."
5. Machine Tools and Workshop Practice for Engineering Students and Apprentices by Alfred Parr (1905)
"131), or a countersink (Fig. 132), and a half centre (Fig. 133). A general
screw-cutting lathe requires, in addition, centres of a much reduced diameter ..."
6. Practical Shipbuilding: A Treatise on the Structural Design and Building of by A. Campbell Holms (1918)
"Lloyd's rules require the countersink to extend right through the plate when ...
A through countersink is advantageous in that it ensures the removal of the ..."
Other Resources:
