PROBLEM TO BE SOLVED: To provide a rotary blade with a blade part that may not be bent or broken by the impact when being brought into abutment with trees and plants or the ground while enabling cutting the trees and plants with thick stems by increasing the thickness of wire used as blades in a bush cutter for use in removing the trees and plants.SOLUTION: A rotary blade for a bush cutter includes a base 1 having a mounting hole 11 mounted to a bush cutter in a central part and having a plate shape, and a blade part 2 fixed to the base 1. The blade part 2 has a metal spring part 21 for drawing a helix from the mounting hole 11 of the base 1 toward an outer circumference, a wire-like blade body 22 extended from one end of the metal spring part 21 and protruded from the outer circumference of the base 1, and a fixing part 23 extended from the other end of the metal spring part 21 and fixed to the base 1.SELECTED DRAWING: Figure 1【課題】草木等を除去するために使用される刈払機において、刃部として使用するワイヤーの太さを太くして茎が太い草木などに対して切断可能としながら、草木や地面などに当接したときの衝撃により曲がったり折れたりしない刃部を備える回転刃の提供。【解決手段】中心部に刈払機へ取り付ける取付孔１１を有し板状の基台１と、基台１に固設された刃部２を備え、刃部２が、基台１の取付孔１１から外周に向かって螺線を描く金属バネ部２１と、金属バネ部２１の一端から延設され基台１の外周から突出したワイヤー状の刃体２２と、金属バネ部２１の他端から延設されて基台１に固定される固定部２３を有する刈払機用回転刃。【選択図】図１
