Abstract: This invention relates to a ultra-speed conversion apparatus for floor treating machines which comprises a wheeled frame, an impeller member attached to the floor treating drive of the floor treating machines for rotation therewith, a plurality of floor treating element holders journaled through the impeller member and circumferentially spaced near the perimeter thereof. The floor treating element holders rotatably move in a track on the frame as the impeller member rotates. Ultra-speed floor treating elements are fastenable to the floor treating element holders which are capable of rotating in excess of 6600 rpm; whereas, the impeller member rotates at approximately 175 rpm. Because of such ultra speeds, the ultra-speed floor treating elements can burnish, strip, sand paper, wax, clean the floors including carpets and rugs more conveniently, faster, and more effectively than slower speed floor treating elements on floor treating machines not using this invention.