Patent ID: 8366358

Claim:
A replaceable cutting insert for use with a generally cylindrical tool body in performing cutting operations when rotated about a central rotational axis, the cutting insert comprising: a cutting tip portion comprising at least one cutting edge; an elongated projection being disposed to project from a central section of the cutting tip portion along the central rotational axis, the elongated projection having a varying radius; wherein the cutting tip portion comprises at least one wing disposed to extend in a substantially radial direction with respect to the central rotational axis and beyond an outer surface of the elongated projection; wherein the at least one wing comprises: a top tip surface and a bottom contact surface, the bottom contact surface being disposed opposite the top tip surface; a peripheral surface being disposed to extend between the top tip surface and the bottom contact surface; a side flute surface being disposed to extend between the top tip surface and the bottom contact surface; and a side bearing surface being disposed opposite the side flute surface and being disposed to extend between the top tip surface and the bottom contact surface; and wherein a cross-section of the elongated projection comprises a pair of elliptical shaped portions, each of the elliptical shaped portions being disposed on opposing sides thereof.