Patent ID: 7909543

Claim:
An insert clamping wedge for clamp-fixing a cutting insert, seated in an insert attachment seat formed in a cutter body, to a recessed portion formed in the insert attachment seat, the insert clamping wedge comprising: a wedge body, wherein the insert clamping wedge is pressed into the cutter body, wherein the wedge body includes a clamp surface which comes into close contact with the cutting insert and a wedge surface of which a gap between itself and the clamp surface becomes smaller in a press-insertion direction of the wedge body, and wherein an external shape of the wedge surface in a section perpendicular to the press-insertion direction of the wedge body includes a protruded curve portion and a distance between recessed curve portions of which a width becomes larger in a direction from both ends of the protruded curve portion toward the clamp surface, the section from the wedge surface to the clamp surface being formed in a bell shape.