Patent ID: 6402439
Filing Date: 2002-06-11
Classification: B21C,B22F,B23B,B23P,Y10T

Abstract:
A tool for chip removing machining, comprising a shank having at least one cutting edge at a front end thereof, and at least one corresponding chip flute for conducting chips generated by the respective cutting edge; a radially central portion of the shank formed of a first hard material; and a radially outer peripheral portion of the shank formed of a second hard material; a cross sectional area of the central portion is larger than the cross sectional area of the outer peripheral portion; the second hard material being harder and less tough than the first hard material; the radially outer peripheral portion being of sufficient thickness that the at least one chip flute is formed entirely therein, and is spaced from the central portion; the first hard material comprising cemented carbide; and further including flush channels extending through the shank solely in the inner portion thereof.