KUEHLMITTELSPRUEHSYSTEM FUER BOHRVORRICHTUNGEN.

摘要

Atomized water is produced at atomizing means (20) mounted on a drilling device and introduced through a mist flow passage (14, 34) formed in a hollow drill (10, 30). By applying the atomized water flowing from the atomizing means (20) to a cutting bit (12, 32) at the leading end of the drill (10, 30) through the mist flow passage (14, 34), the cutting bit (12, 32) heated and reaching a high temperature in drilling is cooled. Thus, a rigid material of concrete or the like can be efficiently drilled without being stained with wetting.