Chisel - Chisel (English spelling)

Japanese: たがね(鏨) - たがね(英語表記)chisel
Chisel - Chisel (English spelling)
A cutting tool used in chipping work, where metal or rock is chipped by the striking action of a hammer. It can be considered the equivalent of a woodworking chisel. A flat chisel is used for cutting and chipping flat surfaces, while a flat chisel is used for rough cutting and cutting grooves (see figure). The angle at which the blade is placed is an important factor, and should be 60 to 70 degrees for steel, 40 to 60 degrees for brass, bronze, and cast iron, and around 30 degrees for white metal. Caulking chisels are used for setting rivets, and for carving corners, corners, and asymmetrical parts that cannot be machined.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
ハンマーの打撃作用によって金属や岩石を削る,いわゆる“はつり作業”に用いられる刃物。木工用ののみ(鑿)に当たるものといえる。切断や平面のはつりには平たがねを用い,荒削りやみぞ切りには友たがね(烏帽子たがね)を用いる(図)。刃をあてる角度は重要な要素で,鋼材には60~70度,黄銅,青銅,鋳鉄には40~60度,ホワイトメタルには30度内外とする。なお,リベットのかしめ,機械加工できないかど部,すみ部,非対称部の彫込みなどに用いるものをコーキングたがねと呼んでいる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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