Patent ID: 7901271

Claim:
A method of performing maintenance for a plurality of blades of a dual arbor chopper comprising the steps of: providing a dual arbor chopper comprising a support housing, a pair of oppositely disposed arbors rotatably positioned within the housing, each arbor having at least one blade attached to the arbor by a clamping block in a first position and at least one fastener positioned through an aperture in the clamping block and an aperture in the blade, each blade comprising a first face side generally parallel to a second face side, and a top surface opposite a bottom surface, wherein a first active cutting edge is formed at the intersection of the top surface and the first face side and is positioned in a first cutting edge position, wherein the first face side of the blade registers against the arbor and the clamping block registers against the second face side of the blade; removing the fastener and the clamping block from each arbor to release the blade when said first active cutting edge of the blade is worn; sharpening each blade by grinding at least the first face side of the blade to form a second active cutting edge; attaching the blade to the arbor with the fastener and the clamping block such that the clamping block is positioned in a second position displaced from the first position by an amount equal to the material ground from the blade; and said second active cutting edge is positioned in a second cutting edge position which is the same as said first cutting edge position without the use of a shim.