ROTARY CUTTING TOOL
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United States of America Patent
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Issued Date -
Jul 23, 2020
app pub date -
Sep 18, 2018
filing date -
Oct 12, 2017
priority date (Note) -
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Abstract
An outer peripheral cutting edge located on a rear side in a rotation axis direction of the inclined cutting edge, a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge, in a cross section perpendicular to a direction in which the inclined cutting edge extends, a cutting edge ridge of the inclined cutting edge has a roundness of a radius less than or equal to 30 μm, and a maximum height difference value of the cutting edge ridge of the inclined cutting edge is less than or equal to 20 μm.
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