| 摘要 |
A throwaway-type cutting tool including a tool body having a distal end, and a plurality of throwaway tips mounted to the distal end. Each of the plurality of throwaway tips including a plate of a substantially rectangular shape. The plate has a corner angle of two adjacent corner cutting edges of a first side in a surface being to 90° or less, and two opposing ridges on the first side including the two adjacent corner cutting edges are defined as cutting edges which are in a non-parallel orientation to each other. Each of the plurality of throwaway tips have a cutting edge arranged to project toward the distal end. The two adjacent corner cutting edges on the first side in each of the plurality of throwaway tips are arranged to project toward an outer periphery of the distal end of the tool body.
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