Patent ID: 6435780
Filing Date: 2002-08-20
Classification: B23C,Y10T

Abstract:
An improved rotary cutting end mill having a shank portion and a cutting portion, the cutting portion comprising a plurality of side cutting edges on the circumference thereof, each side cutting edge defined by a flute formed in the circumference, and terminating in a tip comprising a plurality of end cutting edges, each end cutting edge extending radially outward from the axis of rotation of the end mill to the periphery of the tip and thereat intersecting a side cutting edge and comprising a peripheral end edge portion at the intersection with a side cutting edge and an interior edge portion interiorly from the peripheral end edge portion, the peripheral end edge portion sloping shallowly from the tip periphery towards the shank portion, and the interior edge portion sloping relatively steeply from the peripheral end edge portion towards the shank portion.