Rock drilling tool
The masonry drill bit with spiral cutting edges has main (8) and ancillary cutting edges (13) to form the groove (7) for material removal. The edges defining the groove are of different diameters (d1) and/or have different edge back widths (h1,h8). One or more material removal grooves are divided in...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The masonry drill bit with spiral cutting edges has main (8) and ancillary cutting edges (13) to form the groove (7) for material removal. The edges defining the groove are of different diameters (d1) and/or have different edge back widths (h1,h8). One or more material removal grooves are divided into sections along the spiral path (5), each with a surface (11) to carry the powder waste. |
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