Patent ID: 6749375
Filing Date: 2004-06-15
Classification: B23C,B27G,Y10T

Abstract:
An end milling cutter for machining workpieces made of a non-ferrous metal or plastic, comprising a shank portion and a tool portion, the tool portion having an inner core and an outer diameter and at least two or more helically shaped cutting edges between which helically shaped chip flutes are formed to define a cutting surface along with the cutting edges, and a tool flank between the cutting edge and the chip flute which follows next, the rake angle being approximately 20 to 25Â°, the ratio between the core diameter and the outer diameter being 0.4 to 0.7, the complete tool flank between the cuffing edge and the flute being facet-shaped such that it is composed of three or more individual reference surfaces, comprising at least first, second, and third reference surfaces, which are approximately planar and are disposed at an angle with respect to each other as viewed in a circumferential direction, the clearance angle of the first reference surface following the cutting edge being approximately 10 to 20Â°, and the three or more reference surfaces having the same length.