ARRANGEMENT FOR EMPLOYING DRILL STEEL CENTRALIZER TRAVELLINGON FEED BEAM OF ROCK DRILL MACHINE

摘要

The invention relates to an arrangement for employing a drill steel centr alizer (6) travelling on a feed beam (1) of a rock drill machine (2). The dr ill steel centralizer (6) has a pressure fluid-operated actuator for closing a transfer opening intended for a drill rod (4) during drilling, whereby pr essure fluid is fed into the actuator during drilling.