Cutting by use of rotating axially moving tool – Tool of specific diverse material
Patent
1997-06-09
1999-03-16
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool of specific diverse material
407 32, 408200, 408215, 408224, 408234R, 408712, B23B 2714
Patent
active
058821520
ABSTRACT:
A drill having an elongated body including a fluted land and a shank. The fluted land includes a plurality of radial grooves of reduced material thickness formed therein to the depth of the flutes. The grooves define discrete segments of the drill. Each segment has a facet which has the relief of a drill tip so that when the exposed drill tip becomes dull, the segment can be broken off at the notch exposing a successive, sharp drill tip. The drill can have the cutting edges coated with an appropriate protective material such as TiN, titanium nitride, titanium carbide, titanium carbonitride or any other appropriate coating material to improve cutting and preserve the edge.
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Bhargava Adesh
Denk Paul M.
Howell Daniel W.
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