DRILL STEEL AND ITS MANUFACTURE
A drill steel includes a metal rod with an end to fit within a chuck of a drilling machine, and an integrally formed collar provided along the length of the metal rod. A ferrule is fastened on the metal rod adjacent the integrally formed collar on the side of the end of the metal rod. The ferrule fo...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A drill steel includes a metal rod with an end to fit within a chuck of a drilling machine, and an integrally formed collar provided along the length of the metal rod. A ferrule is fastened on the metal rod adjacent the integrally formed collar on the side of the end of the metal rod. The ferrule forms a stop that prevents the drill steel from moving too far into the chuck. |
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