Patent ID: 6341923
Filing Date: 2002-01-29
Classification: B23B,B23G,Y10T

Abstract:
Threading insert for creating threads in a work piece during a number of passes and radial infeed, wherein the threading insert has a polygonal basic shape including at least one cutting corner having a peripheral edge, wherein the cutting corner has first and second cutting tips along its peripheral edge, each cutting tip including a radially, outwardly extending projection, said projections each extending a length from a first imaginary line, said first imaginary line defined as a line drawn perpendicular to a bisector of adjacent flank edges of said cutting tips, wherein said lengths are different, which cutting tips comprise a cutting edge, which is provided to form a thread top substantially between the cutting tips and that a total, projected length of the cutting edge is smaller than two thread pitches, wherein a leading edge of said first cutting tip and a trailing edge of said second cutting tip during threading at least partly are provided at a distance from the work piece in order not to engage the work piece during the threading operation.