| 摘要 |
PROBLEM TO BE SOLVED: To provide a circular saw capable of achieving excellent finishing on the end face in cutting a high-brittle or fiber workpiece material. SOLUTION: This circular saw is provided in a mixed manner with: an angular tooth (4) with an angular end cutting edge (4a); a first tilt tooth (5) in which the side rake (λ1) and the end tilt angle (K2) of end cutting edges (5a, 6a) are in the opposite direction each other; and a second tilt tooth (6) on the circumferential portion of a plate-shaped substrate (2). The end cutting edges (5a, 6a) of the first tilt tooth (5) and the second tilt tooth (6) are lowered from a rotation advance side toward a rotation delay side. The heights of the end portions (5a-1, 6a-1) on the rotation advance side of the end cutting edges (5a, 6a) are roughly equal to the height of the lateral of the angular tooth (4). Further, regarding the protrusion amount toward the side against the angular tooth (4), the protrusion amount (S1) on the rotation delay side is greater than the protrusion amount (S2) on the rotation advance side. COPYRIGHT: (C)2009,JPO&INPIT
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