Bulb milling cutter

The utility model discloses a bulb milling cutter, its technical scheme main points are bulb milling cutter, including handle of a knife portion and cutting edge portion, cutting edge portion includes first cutting edge and second cutting edge, first cutting edge sets up with second cutting edge symmetry, first cutting edge forms the dead point with the second cutting edge in handing-over department, the dead point width account for first cutting edge or second cutting edge the tread 14, cutting edge portion still includes the supplementary cutting edge of first supplementary cutting edge and second, between first supplementary cutting edge and the first cutting edge, all form all teeth between the supplementary cutting edge of second and the second cutting edge, the back of tooth of all teeth is circular-arc setting. The utility model discloses a bulb milling cutter intensity is high, and the cutting guarantees in the same direction as smooth that the surface of work piece is smooth, and can derive the cutting sweeps easily.