Rotary cutting tool
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United States of America Patent
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Sep 7, 2010
Grant Date -
Apr 17, 2008
app pub date -
Dec 10, 2007
filing date -
Jan 4, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.
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