Bore cutter
AssigneeOmi Kogyo Co., Ltd.
InventorShohei Omi
Life of this patent
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Abstract
First and second bore blade portions are provided on the outer periphery of a rotary shaft at intervals in the circumferential direction with a rotation axis as the center. A first bore blade portion has a continuous blade and a second bore blade portion has a discontinuous blade having protruding blade edges and indented blade edges, which are alternately provided. The distance in the radial direction of the protruding blade edges is set so as to be greater than or equal to the distance in the radial direction of a continuous blade, and the distance in the radial direction of indented blade edges is set so as to be smaller than the distance in the radial direction of the continuous blade. Accordingly, the cutting resistance of the bore cutter can be reduced.
Claims8
A bore cutter, comprising:
- a rotary shaft having a rotation axis, wherein first and second bore blade portions are provided on an outer periphery of the rotary shaft at intervals in a circumferential direction with said rotation axis at the center,
- wherein the first bore blade portion has a continuous blade which is formed by providing a continuous first blade edge in such a manner that the first blade edge extends along said rotation axis, and
- wherein the second bore blade portion has a discontinuous blade which is formed by providing a second blade edge in an uneven form in such a manner that the second blade edge extends along said rotation axis, wherein said discontinuous blade is formed to be a rectangular wave form.
Dependencies are inferred from the claim text.