CUTTING TOOL WITH A REPLACEABLE BLADE EDGE

摘要

As viewed from a side opposing a bottom face (6) of an insert attachment seat, an angle (±) between first and second restraint wall faces (7a) and (7b) rising from the bottom face (6) is smaller than an angle (²) between two peripheral faces of a cutting insert contacting them respectively. One peripheral face out of the two peripheral faces of the cutting insert contacts the first restrain wall face (7a) in a substantially parallel posture with the extending direction of the first restraint wall face (7a), and the other peripheral face contacts the second restraint wall face (7b) in one end portion of the second restraint wall face (7b).