| 摘要 |
A rotary cutting tool with a longitudinal axis of rotation, has a cutting head formed with at least two chip evacuation flutes and at least two body portions therebetween. The body portions bear, at a front face of the cutting head, a plurality of cutting inserts mounted so that their operative cutting edges lie substantially in a plane perpendicular to the axis of rotation. A first body portion bears a first outer cutting insert and a second body portion bears a second outer cutting insert. The operative cutting edge of the second outer cutting insert is substantially shorter than the operative cutting edge of the first outer cutting insert, and their outermost ends are substantially equidistant from the axis of rotation and are spaced therefrom at a distance defining a cutting radius of the cutting tool. |
