DRILLING DEVICE FOR MAKING RELIEVING HOLES

摘要

Drilling device for producing drilled holes with recesses, having a drill bit (2) which has a cross-sectional widened portion and an axial through-bore (16) for drawing off the drillings. The suction cap (3) is held between a flange formed on a drill-bit holder (1) and a flange formed on the shank (13) and consists essentially of a tubular section having a suction nozzle.