| 摘要 |
PROBLEM TO BE SOLVED: To provide a circular saw which holds the cutting quality of the circular saw such as a tip saw over a long period of time to realize the extension life of the circular saw and reduces the running cost required for the replacement of the circular saw. SOLUTION: When a cemented carbide tip 5a is abraded or damaged and the cutting quality of the circular saw becomes bad, a large protruded part 5 is broken at the place of a groove 9 and the part on the upper side of the groove 9 of the large protruded part 5 is removed along with the carbide tip 5a. Since the groove 9 is formed at a position lower than a small protruded part 7, the part on the upper side of the groove 9 of the large protruded part 5 is removed to mostly protrude the acting part 7b of the carbide tip 7a provided to the small protruded part 7 from an outer peripheral part 4. Only the carbide tip 5a is abraded before the large protruded part 5 is removed and the carbide tip 7a of the small protruded part 7 is not abraded to be held to a new product state. Accordingly, the tip saw 1 develops the extremely good cutting quality of the new product. COPYRIGHT: (C)2008,JPO&INPIT
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