DRILLING TOOL, IN PARTICULAR SPIRAL DRILL
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United States of America Patent
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Issued Date -
Nov 12, 2009
app pub date -
Oct 24, 2008
filing date -
May 9, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a drilling tool, in particular a spiral drill, in particular for drilling rock, comprising a tool-side fastening end, a workpiece-side cutting end and an interposed cutting part comprising at least one main helical groove extending along the cutting part, which is defined by a substantially constant helix pitch, and at least one partially cylindrical and/or partially conical helix web outer face extending along the cutting part, defined by at least one main helical groove, it is provided that a plurality of groove sections are formed in the helix web outer face, which extend transversely to the direction of the pitch of the main helical groove.
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