Abstract: A cutter is capable of cutting a pipe-shaped object so as to produce a cut surface which is almost perfectly perpendicular to a longitudinal direction of the pipe-shaped object. A blade has a disc-shaped base plate having a blade edge on an outer periphery of the base plate, a level surface perpendicular to an axis of rotation of the base plate, and a sloped surface opposite the level surface and inclined with respect to the level surface so that a thickness of the blade increases toward a central portion of the blade. The sloped surface is shaped such that an angle of inclination of an outer peripheral portion of the sloped surface with respect to the level surface is larger than an angle of inclination of a remaining portion of the sloped surface with respect to the level surface. The level surface has fine grooves thereon.

Abstract: Provided is a cutter capable of cutting a pipe-shaped material so as to produce a cut surface which is almost perfectly perpendicular to a longitudinal direction of the pipe-shaped material. A blade 1 has a disc-like base plate 2 with a mounting hole 3 provided at a center of the base plate 2. An outer periphery of the base plate 2 is sharpened to function as a blade edge 4. The blade 1 has a level surface 5 which is perpendicular to an axial direction of the blade 1 and a sloped surface 6 which is slanted so that a thickness of a central portion of the base plate 2 is larger than a thickness of a periphery of the base plate 2. Since the sloped surface 6 is only provided on one side of the blade edge 4, the blade 1 is asymmetric when viewed from a side thereof.