| 摘要 |
PURPOSE:To provide smooth operation of cutting small and exhausting the splash produced from a tool such as a rotary cutter, which is furnished with two or more cutting tips at the periphery of the tool body, by constituting cutting tips from two groups of different types, and by placing them alternately. CONSTITUTION:If the subject of this invention is embodied in a rotary cutter, the cutting tips are constituted from No.1 group cutting tips 1 and No.2 group 11, which have a little different configuration from each other, and they are placed alternately at the periphery of the tool body 71. Each cutting tip 1 is provided with a ridge 2 at its front face stretching from the root to the foremost end, wherein a fore cutting edge A is prepared at the front face foremost end of this ridge 2 as well as rear cutting edges 5 behind theeof on both sides nearer the root part than cutting edge 4. Each cutting tip 11 is provided at its front face bottom with a cutting edge 13 to cut at least the cut surface prepared by said rear cutting edges 5. The cutting edges 4, 5 shall yield splash with different thicknesses. |
