| 释义 |
countersink
 countersinksingle-flute countersink bitcoun·ter·sink C0690200 (koun′tər-sĭngk′)n.1. A hole with the top part enlarged so that the head of a screw or bolt will lie flush with or below the surface.2. A tool for making such a hole.tr.v. coun·ter·sunk (-sŭngk′), coun·ter·sink·ing, coun·ter·sinks 1. To make a countersink on or in.2. To drive (a screw or bolt) into a countersink.countersink (ˈkaʊntəˌsɪŋk) vb (tr) , -sinks, -sinking, -sank or -sunk1. (Building) to enlarge the upper part of (a hole) in timber, metal, etc, so that the head of a bolt or screw can be sunk below the surface2. (Building) to drive (a screw) or sink (a bolt) into such an enlarged holen3. (Building) Also called: countersink bit a tool for countersinking4. (Building) a countersunk depression or holecoun•ter•sink (ˈkaʊn tərˌsɪŋk)
v. -sank, -sunk, -sink•ing,
n. v.t. 1. to enlarge the upper part of (a hole) to receive the head of a screw or bolt. 2. to set the head of (a screw or bolt) flush with or below the surface. n. 3. a tool for countersinking a hole. [1810–20] countersink
Past participle: countersunk
Gerund: countersinking
| Imperative |
|---|
| countersink | | countersink |
| Present |
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| I countersink | | you countersink | | he/she/it countersinks | | we countersink | | you countersink | | they countersink |
| Preterite |
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| I countersank | | you countersank | | he/she/it countersank | | we countersank | | you countersank | | they countersank |
| Present Continuous |
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| I am countersinking | | you are countersinking | | he/she/it is countersinking | | we are countersinking | | you are countersinking | | they are countersinking |
| Present Perfect |
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| I have countersunk | | you have countersunk | | he/she/it has countersunk | | we have countersunk | | you have countersunk | | they have countersunk |
| Past Continuous |
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| I was countersinking | | you were countersinking | | he/she/it was countersinking | | we were countersinking | | you were countersinking | | they were countersinking |
| Past Perfect |
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| I had countersunk | | you had countersunk | | he/she/it had countersunk | | we had countersunk | | you had countersunk | | they had countersunk |
| Future |
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| I will countersink | | you will countersink | | he/she/it will countersink | | we will countersink | | you will countersink | | they will countersink |
| Future Perfect |
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| I will have countersunk | | you will have countersunk | | he/she/it will have countersunk | | we will have countersunk | | you will have countersunk | | they will have countersunk |
| Future Continuous |
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| I will be countersinking | | you will be countersinking | | he/she/it will be countersinking | | we will be countersinking | | you will be countersinking | | they will be countersinking |
| Present Perfect Continuous |
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| I have been countersinking | | you have been countersinking | | he/she/it has been countersinking | | we have been countersinking | | you have been countersinking | | they have been countersinking |
| Future Perfect Continuous |
|---|
| I will have been countersinking | | you will have been countersinking | | he/she/it will have been countersinking | | we will have been countersinking | | you will have been countersinking | | they will have been countersinking |
| Past Perfect Continuous |
|---|
| I had been countersinking | | you had been countersinking | | he/she/it had been countersinking | | we had been countersinking | | you had been countersinking | | they had been countersinking |
| Conditional |
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| I would countersink | | you would countersink | | he/she/it would countersink | | we would countersink | | you would countersink | | they would countersink |
| Past Conditional |
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| I would have countersunk | | you would have countersunk | | he/she/it would have countersunk | | we would have countersunk | | you would have countersunk | | they would have countersunk |
Thesaurus| Noun | 1. | countersink - a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surfacehole - an opening deliberately made in or through something | | 2. |  countersink - a bit for enlarging the upper part of a holecounterbore, countersink bitbit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit" | | Verb | 1. | countersink - insert (a nail or screw below the surface, as into a countersink)setbury, sink - embed deeply; "She sank her fingers into the soft sand"; "He buried his head in her lap" |
TranslationssvasareaccecareaccecatoiofresareCountersink
countersink[′kau̇nt·ər‚siŋk] (design engineering) The tapered and relieved cutting portion in a twist drill, situated between the pilot drill and the body. Countersink (Russian, zenkovka; from German senken, “to sink, lower”), a cutting tool used for countersinking. Countersinks usually form part of a set with centering drills. The sizes of countersinks in each set depend on the diameter of the hole; in all sets, the vertex angle is 60°. Coun tersinks are made for chamfering center holes with diameters of 0.5 to 1.5 mm (ordinary countersinks), for holes with diameters of 0.5 to 6 mm (with or without protective taper), and for holes with diameters of 8 to 12 mm (with tapered stem). Countersink cutting elements are made from high-speed steel; countersinks with tapered stems are welded and the stems are made from carbon structural steel. countersink  countersink A boring bit having a conical-shaped cutter; used to make a depression to receive the head of a screw or bolt so that it does not protrude above the surface.See CTSK
See CTSKcountersink
Synonyms for countersinknoun a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surfaceRelated Wordsnoun a bit for enlarging the upper part of a holeSynonyms- counterbore
- countersink bit
Related Wordsverb insert (a nail or screw below the surface, as into a countersink)SynonymsRelated Words |