noun
boring machine; punching machine; perforator
A machine for drilling or punching holes, typically in industrial contexts.
この工場では、金属板に穴を開けるために鑽孔機を使っている。
In this factory, they use a boring machine to make holes in metal sheets.
Compound of 鑽 (san, 'to bore, drill') + 孔 (kō, 'hole') + 機 (ki, 'machine'). The exact historical derivation is uncertain, but the kanji directly reflect the meaning.