counterbore

English edit

A counterbore in a piece of metal.

Etymology edit

From counter- (“against”) +‎ bore (“hole”).

Noun edit

counterbore (plural counterbores)

A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.
The tool with which a counterbore is machined.

Translations edit

recess-machining tool

Dutch: verzinkboor (nl) m or f
French: chambrage (fr) m
Italian: accecatura f, svasatura f, accecatoio m
Russian: зенко́вка (ru) f (zenkóvka), цеко́вка (ru) f (cekóvka), зе́нкер (ru) m (zénker)

Verb edit

counterbore (third-person singular simple present counterbores, present participle counterboring, simple past and past participle counterbored)

(transitive) To create such a cylindrical recess.