| 摘要 |
PROBLEM TO BE SOLVED: To efficiently collect dust regardless of the depth of cut. SOLUTION: A dust nozzle 22 is, in a state of crossing a saw tooth 5, connected to a front lower part on a rear side of a blade case 7. Though an opening 28 is formed on the periphery of the saw tooth 5 so that an edge part on the saw tooth 5 side of a main body part 23 in the dust nozzle 22 exists at a position wherein a peripheral edge of the saw tooth 5 passes by seeing from a front side, a grinding plate 29 crossing in no contact the peripheral edge of the saw tooth 5 by an excision part 30 is protruded to the front side on the downstream side in the rotary direction of the saw tooth 5 on the periphery of the opening 28.
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