| 摘要 |
PURPOSE: A rotary saw is provided to forwardly and reversely drive and to extend lifetime. CONSTITUTION: A rotary saw(1') comprises sintered carbide(14-1,14-2,15-1,15-2) with predetermined thickness which is thicker than the thickness of saw teeth(14,15) at the end of rotation direction of each saw teeth. The sintered carbide is formed in an inclined shape to be sharp towards the front side with respect to the rotation direction. The sintered carbide individually adhered to a front sawtooth and a rear sawtooth is adhered to be protruded in a predetermined height.
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