Four edge round nose milling cutter, also known as four edge bull nose cutter, is a commonly used precision milling tool in CNC machining. It combines the advantages of flat bottom milling cutters and ball end milling cutters, with four spiral cutting edges, a rounded transition at the tip, no sharp right angles, and a sturdy and stable overall structure.

    Compared to ordinary flat bottomed pointed knives, the round nose design can effectively disperse cutting pressure, reduce tool tip wear and chipping, and significantly improve tool life. The four blade structure makes the cutting tool more rigid and the cutting smoother. The surface of the processed workpiece is smooth and the texture is delicate, suitable for semi precision and precision machining of hard materials such as steel, stainless steel, and mold steel.

    It is mainly used for milling flat surfaces, steps, cavities, and structures with rounded corners, which can quickly remove materials while ensuring machining accuracy. Although the chip removal space is not as good as two blade cutting tools and is not suitable for deep groove roughing of aluminum materials, it has obvious advantages in batch precision machining of molds and hardware, and is an indispensable universal tool in industrial CNC machining.