counterbore en · NOUN
Etymology
Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *-teros Proto-Italic *-teros Proto-Italic *komterosder. Proto-Italic *komterād Latin contrāder. Old French contre- Anglo-Norman countre-bor. Middle English counter- English counter- Proto-Indo-European *bʰerH-der. Proto-Germanic *burōną Proto-West Germanic *borōn Old English borian Middle English boren English bore English counterbore From counter- (“against”) + bore (“hole”).
Meanings
- A cylindrical recess, typically machined at the mouth of a hole to admit a screw (such as a cap screw) so that the screw sits flush with a surface.
-
The cutter used to cut such a recess. (Also used, at less depth, for spotfacing.)
Meronyms: flute, pilot (the land at the tip, which rides the hole as a guide), shank
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| counterbores | Number=Plur | lexicographic |
Coordinates
reamer · endmill · drill bit · countersink · countersink · drill
Hypernyms
Relateds
Translations (8)
fr chambrage (recess-machining tool) · it svasatura (recess-machining tool) · ru цеко́вка (recess-machining tool) · it accecatura (recess-machining tool) · it accecatoio (recess-machining tool) · ru зенко́вка (recess-machining tool) · nl verzinkboor (recess-machining tool) · ru зе́нкер (recess-machining tool)