MASONRY DRILL BIT
The invention is directed to a masonry drill bit having a shank (1) having an insertion end (2) and a drill head (3), wherein the main cutting edges (4, 5) each converge toward a transverse cutting edge (8) arranged in the central region of the drill head (3), wherein the transverse cutting edge (8)...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The invention is directed to a masonry drill bit having a shank (1) having an insertion end (2) and a drill head (3), wherein the main cutting edges (4, 5) each converge toward a transverse cutting edge (8) arranged in the central region of the drill head (3), wherein the transverse cutting edge (8) is formed in a substantially concave manner with two transverse cutting tips (11, 12) at its ends. It is essential that the transverse cutting edge (8) is formed by two adjacent channels (13, 14) and in that each transverse cutting tip (11, 12) is adjoined by two webs (15-18) which provide the lateral boundaries of the channels (13, 14) by forming additional edges, such that each channel (13, 14) has a leading web (16, 17) and a trailing web (15, 18). |
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