CUTTING TOOL

原文（中国語）

For a cutting insert to be used particularly for copy machining or finish machining, a cutting tool is provided that can avoid interference with a machined surface, while suppressing deterioration of a rigidity and a bonding strength, occurrence of breakage and chattering, or the like. A cutting tool includes a base insert member extending along a longitudinal direction and a cutting edge member provided at a longitudinal end portion of the base insert member. The cutting edge member includes a rake surface, a flank surface, an arcuate cutting edge, a breaker wall, and a boss portion including a boss surface. A center angle of the cutting edge is not less than 180°, and each of edge portions present behind the cutting edge along the longitudinal direction has at least a portion that is chamfered.