Cutters – for shaping – Rotary cutting tool – Face or end mill
Reexamination Certificate
2005-10-11
2005-10-11
Banks, Derris H. (Department: 3722)
Cutters, for shaping
Rotary cutting tool
Face or end mill
C407S053000, C407S061000, C407S062000, C407S063000, C407S119000
Reexamination Certificate
active
06953310
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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Iwamoto Kenji
Tsuritani Yousuke
Addisu Sara
Banks Derris H.
Nachi-Fujikoshi Corp.
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