Patent ID: 8419322
Filing Date: 2013-04-16
Classification: B23B,Y10T

Abstract:
1. A rotating cutting tool for use in machine tools, comprising at least one cutting insert ( 16 ′, 16 ″, 16 ″′, 16 IV ) designed as an indexable cutting insert, comprising an active major cutting edge ( 26 ) which is arranged in the region of an insert corner ( 25 ) of the cutting insert, defines a pitch circle radius (R) at its outermost end ( 28 ) during rotary use and penetrates with a predetermined cutting depth (t) into a workpiece ( 32 ) in the region of a preformed round hole ( 30 ), comprising a minor cutting edge ( 36 ) which adjoins the outermost end ( 28 ) of the major cutting edge ( 26 ) against a feed direction ( 34 ) and is arranged over its entire length on a smaller radius than the pitch circle radius (R) of the major cutting edge ( 26 ), comprising a minor cutting edge flank ( 38 ) adjoining the minor cutting edge ( 36 ) against the direction of rotation ( 37 ), and comprising at least one support element arranged at a distance from the major cutting edge ( 26 ) against the feed direction ( 34 ), characterized in that the minor cutting edge, flank ( 38 ) has a support part ( 40 ) which is arranged at a distance from the minor cutting edge ( 36 ) against the direction of rotation ( 37 ) and forms at least one support element and the radius of revolution of which is greater than the pitch circle radius (R) of the active major cutting edge ( 26 ) by a projecting size (Y).