Blade holding structure for rotary tool

摘要

A rotary tool including a disc-like body having an axis of rotation and a plurality of circumferentially spaced, serrated portions each having opposed side faces bounded by a leading surface, a trailing surface and a top surface, said top surface being bounded by said leading and trailing surfaces. A radially extending recess is formed between the opposed side faces of each of the serrated portions and opening to both top and leading surfaces thereof. A blade insert is fitted in and fixed to the recess of each of the serrated portions and has an operating surface so that, when the disc-like body is rotated about the axis, a work can be machined by contact with the operating surface of the blade insert of each of the serraled portions. <IMAGE>