| 摘要 |
<p>A cutting insert in an embodiment of the present invention relates to a cutting tool for machining a narrow groove. Said cutting insert is equipped with an insert body and multiple protrusions. The insert body is equipped with a body upper surface, a body bottom surface, and a body side surface that extends therebetween, and has a mounting hole that has an axis and penetrates through the body upper surface and body bottom surface. The protrusions, each having a cutting edge, are integrally formed with the insert body at outer positions of the insert body in directions orthogonal to the axis. The body lower surface is positioned closer to the body upper surface than the bottom surface of the protrusions in a direction parallel to the axis. As a result, the thickness of the insert body can be made thinner the protrusions, and the thickness of the bottom wall surface of an insert-mounting seat that comes into contact with the insert body can be increased. Consequently, a screw can be screwed with sufficient length into a screw hole of the bottom wall surface through the mounting hole.</p> |
