A wavy disc blade 110 is provided. The wavy disc blade includes a first side 112, a second side 140, a central portion 114 having at least one opening 116, and a wavy portion 118 adjacent to, extending radially from and circumferentially about the central portion. The wavy portion includes a plurality of waves 120 extending from the central portion to an edge portion 122, the waves forming a plurality of crests 124 and valleys 126 between the central portion and the edge portion. The wavy disc blade also includes a plurality of teeth 128 formed along the edge portion. One of a first beveled portion 138 may be formed on the first side at and along the edge portion and a second beveled portion1 142 may be formed on the second side at and along the edge portion.
