Two-piece drill bits

Details Two-piece drill bits Two-piece drill bits

B - Operations, Transporting

23

B

B23B 51/00 (2006.01)

Patent

CA 2353652

Two-piece drill bits and methods of manufacturing same provide a preferably hexagonal shank, and a drill portion having a proximal end inserted into an axial hole in a distal end of the shank. In a preferred embodiment, at least part of the area adjacent the proximal end of the drill portion is knurled. Alternative embodiments have wings, polygons, tapers or other irregular shapes, or combinations of same. A variety of means may be employed to mechanically capture the drill portion in the shank.

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