Abstract: A chipper machine for simultaneously preparing a flat surface on a workpiece and comminuting material removed from the workpiece to produce the flat surface, in which several individually removable chipper knives are mounted on a hub mounted detachably on a rotatable arbor. A workpiece-supporting anvil includes a drop front section to permit removal of the chipper head from the arbor. The hub and arbor are steeply tapered to allow the chipper head to be easily removable from the arbor, and the chipper machine is provided with sharpened chipper knives by replacement of the entire chipper head. The several chipper knives are removed, sharpened, replaced, adjusted and again ground to cut uniformly with the chipper head removed from the chipper machine.

Abstract: Apparatus for shaping a flat surface on a workpiece includes a rotary chipper head having a plurality of radially oriented chipper knives having facing edges and chipping edges, and a circular saw blade having a diameter greater than that of the end of the chipper head closest to the workpiece. The circular saw blade is attached to the hub of the chipper head and apertures are defined in the circular saw blade to receive the ends of the knives of the chipper head, so that the chipper knives extend into the apertures in the circular saw blade. The surface formed on the workpiece is that cut by the teeth of the circular saw, and material cut from the workpiece by the saw blade is cut into chips by the chipper knives. The saw blade is thus allowed some freedom of movement relative to each chipper blade, and the facing edges of the chipper blades rotate within the kerf of the circular saw blade.