Sheet metal drill bit

Details Sheet metal drill bit Sheet metal drill bit

B - Operations, Transporting

23

B

77/35

B23B 51/05 (2006.01)

Patent

CA 1307953

SHEET METAL DRILL BIT ABSTRACT A sheet metal drill bit for drilling burrless round holes in thin products. The drill bit comprises a solid drill body having a drill head and a connecting shaft. The drill head has at least one outer cutting edge in a front face thereof. A stabilizing central drill bit extends from the front face and beyond the outer cutting edge. The cutting edge has an elevated leading edge portion and a downward sloping trailing portion with an inwardly extending cutting surface. A concave well is defined between the outer cutting edge and the central drill bit. The trailing portion tapers to at least the front face from which the central drill bit extends and to an angulated web portion. The concave well retains undrilled product pieces about the central drill bit whereas the web portion permits evacuation of loose drilled material.

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