Drilling device for producing drill holes with an undercut

Details Drilling device for producing drill holes with an undercut Drilling device for producing drill holes with an undercut

B - Operations, Transporting

28

D

77/30

B28D 1/14 (2006.01) B23B 51/00 (2006.01) B23Q 1/00 (2006.01) B23Q 11/00 (2006.01)

Patent

CA 2000054

A drilling device for producing drill holes with undercuts and comprising a drill bit, a drill bit holder for receiving the drill bit and having a suction chamber, and a suction bell surrounding the drill bit holder and communi- cating with the suction chamber therein, the stem of the drill bit having a continuous axial bore communicating with the suction chamber and a plurality of slots arranged in a region of a cross-sectional enlargement of the stem.

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