Abstract: A method for cutting a chamfer on an edge of a concrete slab, the method comprising the steps of: making a generally planar cut, beginning a distance from the edge, with a generally circular, generally laminar concrete saw blade rotatably powered by a right-angle grinder motor, the generally planar cut being made at a desired angle and creating a cantilevered ledge above the generally planar cut; fracturing and removing at least a portion of the cantilevered ledge from the slab whenever an edge of the cantilevered ledge is proximate the hub; and continuing the generally planar cut until the cantilevered ledge is severed from the slab.

Abstract: An apparatus for cutting a chamfer on an upper edge of a concrete slab includes a hub designed for installation on the threaded output spindle of an angle grinder, and a specially-modified diamond-grit-edged rotary blade which mounts on the hub. For a preferred embodiment of the hub, an attachment collar is unitary and concentric with both a blade mounting flange having countersunk attachment screw holes and a blade centering shoulder on the flange. The attachment collar has at least one pair of flattened parallel sides for receiving a wrench used to tighten the hub on the output spindle. The blade, which is equipped with both countersunk attachment holes and a central positioning aperture sized to fit closely over the blade centering shoulder, is attachable with countersinking screws to the mounting flange so that the head of each screw is flush with the surface of the blade.

Abstract: An apparatus for cutting a chamfer on an upper edge of a concrete slab includes a hub designed for installation on the threaded output spindle of an angle grinder, and a specially-modified diamond-grit-edged rotary blade which mounts on the hub. For a preferred embodiment of the hub, an attachment collar is unitary and concentric with both a blade mounting flange and a blade centering shoulder on the flange. The attachment collar has at least one pair of flattened parallel sides for receiving a wrench used to tighten the hub on the output spindle. The side of the blade mounting flange opposite the collar is equipped with multiple countersunk threaded holes, by means of which the blade may be attached with countersinking screws. The rotary blade is equipped with a central positioning aperture sized to fit closely over the blade centering shoulder. The blade is equipped with countersunk holes which align with those on the blade mounting flange.

Abstract: An apparatus for cutting a chamfer on an upper edge of a concrete slab includes a hub designed for installation on the threaded output spindle of an angle grinder, and a specially-modified diamond-grit-edged rotary blade which mounts on the hub. For a preferred embodiment of the hub, an attachment collar is unitary and concentric with both a blade mounting flange having countersunk attachment screw holes and a blade centering shoulder on the flange. The attachment collar has at least one pair of flattened parallel sides for receiving a wrench used to tighten the hub on the output spindle. The blade, which is equipped with both countersunk attachment holes and a central positioning aperture sized to fit closely over the blade centering shoulder, is attachable with countersinking screws to the mounting flange so that the head of each screw is flush with the surface of the blade.