| 摘要 |
<p>[Problem] Providing a throw-away rotating tool which enables an improvement in productivity, and is excellent in ease of attachment and detachment of a cutting head to and from a body. [Solution to Problem] Plural protrusions 24a formed in a part of an outer peripheral wall 24 of a projecting coupling portion 23. Since the twist angle and a twist direction of the protrusions 24a are set in such a way that with relative rotation when coupling the projecting coupling portion 23 and erected portions 13 together, due to the reaction force received by the protrusions 24a from inner peripheral walls 13a, the projecting coupling portion 23 is pulled to the rear and side of the erected portions 13 and the projecting coupling portion 23 is stably held between the erected portions 13. Since the number of portions that require stringent dimension control and high machining accuracy can be reduced, productivity can be improved. Further, since the protrusions 24a are formed as a part of the outer peripheral wall 24 of the projecting coupling portion 23, the force required for the relative rotation can be reduced and the ease of attachment and detachment can be improved.</p> |
