Abstract: Disclosed herein are rotary cutting assemblies for cutting growing vegetation with tough whirling filament. The assemblies generally comprise an elongate lineal shaft extending along a vertical-axis, the longitudinal shaft having a top-end for removable insertion into a portable manually-graspable powered chuck; a horizontal disc-like base-plate in co-rotatable association with the shaft lower portion; a convolutely coiled supply of filament surrounding the shaft vertical-axis; axial confinement means for confining the stored filament toward the base-plate; retainer means attached to the base-plate for removably securing successive leadward portions of the wearable cutting filament adjacent the base-plate peripheral-edge; and gravimetric balancing means for the rapidly rotating lower head portion of the assembly comprising base-plate and environs.

Abstract: Disclosed are rotary cutting assemblies for cutting growing vegetation with a tough whirling flail. The assemblies generally comprise an elongate lineal shaft extending along and powerably rotatable about a vertical-axis, a horizontal base-plate in co-rotatable association with the shaft lower part, retainer means attached to the base-plate, and an elongate horizontal flexible flail extending radially outwardly from the retainer means along a horizontal-axis. For the purposes of promoting vegetation cutting action as the flail rotates about the shaft, and consistent with operational safety, the flail comprises a central-core along the horizontal-axis of a tough flexible resinous material and an external-contour of varying cross-sectional size. Preferably, the external-contour is provided by prominent protuberances surrounding the central-core and which enhances vegetation cutting without danger of inflicting injury to the operator.