Patent ID: 7631586

Claim:
A cutting tool for forming a slit on a sheet material, the cutting tool comprising: a cutting tool body, a grooving blade for forming a slit, and a notching blade for forming an end portion of a slit, wherein the cutting tool body is formed in an accurate shape, the grooving blade is formed along either edge along the thickness direction of the cutting tool body, the notching blade is provided with a semi-cylindrical blade edge and an attachment site capable of being detachably attached to one end of the cutting tool body, and the notching blade is attached to one end of the cutting tool body in such a manner that an outer curved surface of the blade edge is exposed outside the cutting tool body, and the attachment site is configured such that the blade edge can be adjusted in the radial direction, relative to a rotating axis of the cutting tool, of the cutting tool body, wherein the attachment site is provided with an oblong hole, and the notching blade is attached to the cutting tool body by inserting a bolt, via the oblong hole, into a bolt hole formed in one end surface of the cutting tool body.