지정품명부호 검색

착암기 봉에 장착하기 위하여 한쪽 끝에 암나사와 테이퍼소켓이 달린 착탈식 절삭드릴링공구이다. 반대편 끝은 충격과 약간의 회전운동으로 바위에 구멍을 뚫기 위해 두개 이상의 절단날로 되어 있다.

A detachable, end cutting drilling tool with an internal thread or tapered socket at one end for attaching a rock drill rod. The opposite end is designed with two or more cutting edges for drilling into rock formation by impact and a slight rotary motion. It contains a hole or holes in the cutting for the purpose of conducting air or water to clear the hole being drilled. It is used with powered drifter drills, sinker drills, and the like.