Patent ID: 8388269

Claim:
A pin mirror cutter comprising: an adaptor mounted on a processing machine; and a substantially annular cutter body which is attached to the adaptor and rotates around an axis, wherein the cutter body is formed with a substantially annular flange part which protrudes in a radial direction of the cutter body from a substantially entire periphery of a peripheral face of the cutter body, and the adaptor is formed with a substantially annular stepped part which is recessed in the radial direction of the cutter body from a substantially entire periphery of a peripheral face of the adaptor and receives the flange part, and wherein, with the cutter body attached to the adaptor, the flange part and the stepped part are brought into radially flat surface contact with each other such that they overlap each other in a flat plane in the radial direction of the cutter body, and a radial length of the cutter body in this contact surface is set to be in a range of 0.1 D to 1.0 D where D refers to a thickness of the cutter body.