Rotary impact rock drill - Rotary impact rock drill

…The cutting method is called a rotary rock drill because it rotates a rod with a bit attached to the end. In addition, the rotary percussion rock drill, which combines the two, has become popular in recent years. Percussion rock drills are mainly driven by compressed air, while small rotary rock drills are driven by compressed air motors or electric motors, and large ones by hydraulic motors. …

*Some of the terminology used to refer to "rotary impact rock drills" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…切削によるものは，ビットを先端にとりつけたロッドを回転させるので，回転式削岩機という。そのほか，両者を組み合わせた回転打撃式削岩機が近年普及しつつある。打撃式削岩機はもっぱら圧縮空気で，回転式削岩機は，小型のものは圧縮空気モーターまたは電動機で，大型のものは油圧モーターで駆動される。…

※「回転打撃式削岩機」について言及している用語解説の一部を掲載しています。

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