| 摘要 |
In a body (1) for a cutting tool (100) having an insert seat (3), to which a cutting insert (2) is removably attached, not only a structure for preventing a crack at the insert seat, caused by stress concentration, is adopted, but also the cutting insert (2) is stably seated at and firmly attached to the insert seat (3). A recessed curve portion (7) is formed at a crossing portion between a bottom surface (4) and a wall surface (5) of the insert seat (3). As viewed in cross section perpendicular to the bottom surface (4), the cross-sectional shape of the curve portion (7) includes an arc having a radius R of curvature within a range from 0.5-1.2 mm. A height (H) from the bottom surface (4) to a connecting portion between the wall surface (5) and the curve portion (7) is set within a range from 0.1-0.8 mm. |
