A rotating disc assembly for use on a stump grinder includes a rotating disc defining a peripheral edge, a first side and a second side, and a central axis positioned through a central position of the rotating disc; a first cutting bit mechanically connected to a first position on the peripheral edge of the rotating disc; and a first shield assembly mechanically connected to a second position on the peripheral edge of the rotating disc in front of the first cutting bit, wherein the first shield assembly comprises a first footprint formed by a first portion extending a first radial distance from the central position and extending a first axial distance from at least the first side or the second side, wherein a footprint of the first cutting bit is at least partially shielded by the first footprint of the first portion of the first shield assembly.
