| 摘要 |
A rotating tool capable of absorbing a stress caused by a cutting force during a cutting operation. The rotating tool has a holder having a plurality of groove portions in a front end surface, a cutting head having a plurality of protrusion portions in a rear end surface, and a screw clamping the cutting head to the holder. The groove portion has a pair of groove side surfaces and tapers in a radially outward direction. The protrusion portion has a pair of protrusion side surfaces and tapers in the radially outward direction. A bent portion is formed in one of the groove side surface and the protrusion side surface. When the cutting head is clamped to the holder, a relief angle is formed between the groove side surface and the protrusion side surface from the bent portion in the radially outward direction. |
