Extremely robust percussion drill bits with much longer service life than conventional concrete drill bits.
High drilling speed thanks to wide Twinmax spiral.
Special surface hardening technique by blasting guarantees extreme breaking strength.
Developed for frequent use in concrete and stone.
Certified by the Prufgemeinschaft Mauerbohrer(PGM) in accordance with the requirements of the Deutsches Institute fur
Bautechnik(DIBt).
Comparision
between auto-copper soldering and manual brazing
| Comparision | Auto - copper soldering | Manual brazing |
| Soldering flux | Special copper flux prescription with higher melting point | Copper wire/strip with 10-25% silver, with 700-850°C melting points. |
| Soldering / Brazing temperature | 1200-1250°C soldering temperature ensures the drill bit with a higher heatresistant performance when in continuous drilling, the strong attachment of the copper flux prevents the carbide tip from falling. | 700-850°C on high frequency brazing machine |
| Soldering / Brazing process | Inside the vacuum soldering oven, gradually warming up ensures the steady character of the carbide tip, not easily be fragile. | Instant heat up destroy the inner structure of the carbide tip to be fragile, breakage happen during drilling. |
| Soldering / Brazing strength | Melted copper flux assures proper and complete distribution of copper soldering elements to attach the tip and shaft as a whole. Then longer life time is ensured. | Manual brazing brazing flux not evenly distributed, open or inconsistent brazing easily appear. The unevenly distributed brazing flux always cause the carbide tip dropping in big diameter drill bits. |
