Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kenji Iwamoto0
Yousuke Tsuritani0
Date of Patent
October 11, 2005
0Patent Application Number
104091110
Date Filed
April 9, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A cemented carbide ball end mill comprises a cutting portion with a semi-spherical ball portion at a tip thereof. The cutting edge portion has a cutting edge rake face and a chip evacuating flute at the ball portion. An angle formed by a straight line connecting a vertex of the ball portion, where an intersection line passes through, and another end of the intersection line with respect to the central axis, is from 30° to 50°. Further, and angle formed by the rake face and the chip evacuating flute is from 100° to 150°, and a width of the chip evacuating flute is 0.5 to 5 times as large as a radius of the ball portion.
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