PROBLEM TO BE SOLVED: To provide a rotary blade for a bush cutter of which weight is further reduced while strength to withstand use is secured.SOLUTION: A rotary blade for a bush cutter is continuously provided with a plurality of lightening holes having a planar-fillable shape between a central part and a blade part of the rotary blade while being filled in a planar manner, thereby reducing weight and improving shock absorption capacity while maintaining strength of the rotary blade.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】使用に耐える強度を確保しながら、より軽量化された刈払機用の回転刃を提供する。【解決手段】回転刃の中心部から刃部の間に平面充填可能な形状の軽量孔を平面充填する態様で連続して複数個設け、回転刃の強度を維持しながら軽量化と衝撃吸収力の向上を実現した。【選択図】なし
