| 摘要 |
A ball nose cutting tool for mounting within a shank-receiving socket of a powered rotatable spindle. The tool includes an elongate and cylindrical shaped tool holder for insertion within the socket of the spindle and a generall y rounded upper end. A plurality of insert receiving cavities are formed within the upper end of the tool and a plurality of insert bits are seatingly engaged within the individual insert cavities via threaded openings which are formed in both planar inner side walls defining the cavities and the seatingly engaging drill bits for receiving a screw fastener. An arcuate and curved cutting edge extends from opposite ends of the planar bottom surface and planar end surface and defines a cutting zone extending from the outer periphery to the center of the tool holder. The cutting edges of the arrayed inserts contact one another at the center of the tool holder in a level fashion so that equal cutting forces are applied during high-speed cutting by the tool and equal wear occurs along each of the cutting edges. |
