Patent ID: 6123490
Filing Date: 2000-09-26
Classification: B23B,Y10S,Y10T

Abstract:
A tool for trepan machining hard metallic material by forming an endless groove in the material, with the groove having inside and outside cylindrical side walls and an annular bottom wall, the tool comprising:a plurality of inside and an equal plurality of outside wall cutting inserts of hardened material, the tool inserts are circumferentially spaced and adjacent tool inserts are alternately positioned to cut either the inside or the outside cylindrical side wall, each inside wall cutting insert is positioned circumferentially opposite an outside wall cutting insert, each insert having at least one cutting edge and at least one mounting edge, each insert having a cutting width in the radial direction which is at least one half the total width of the groove but less than the width of the groove;a tool body having a cutting end, a plurality of insert pockets formed at the cutting end, each pocket having a mounting edge formed therein;connectors removably mounting one insert in each pocket with the cutting edge on the insert aligned to cut only one side wall of the groove; andthe mounting edge on the insert contacting the mounting edge in the insert pocket.