研とぎ上あげ

Meanings

Mechanical engineering term for the precision finishing process that uses abrasive stones to improve the geometry and surface finish of a bore or cylinder.

エンジンのシリンダー内ない壁へきを研とぎ上あげ加か工こうする。
The inner wall of the engine cylinder is honed.
研とぎ上あげによって表ひょう面めん粗あらさが改かい善ぜんされた。
The surface roughness was improved by honing.

Kanji

研polish, study of, sharpen
上above, up

Related words

研けん磨ま
研磨 is a broader term for polishing or grinding, while 研ぎ上げ specifically refers to the honing process used for precision finishing of bores.
ラッピング
ラッピング (lapping) is a similar finishing process but uses loose abrasive between two surfaces, whereas 研ぎ上げ uses bonded abrasive stones.

Built from

研とぐ+上あげる

Written forms

研とぎ上あげ
Standard kanji spelling for the honing process.
とぎ上あげ
Mixed kana-kanji spelling, also seen in technical contexts.

Etymology

Compound of 研ぎ (togi, the continuative form of 研ぐ 'to sharpen, to polish') and 上げ (age, the continuative form of 上げる 'to finish, to complete'). Literally 'polishing up' or 'finishing by sharpening'.