Patent ID: 7581374

Claim:
A grass cutting unit of a mower, which comprises: (a) a frame that carries at least one grass cutting member; (b) at least one ground engaging roller carried on the frame for at least partially supporting the frame for rolling over the ground; and (c) wherein the roller comprises a plastic roller body integrally molded onto a hollow, substantially cylindrical, metallic tube having enlarged diameter ends, each of the enlarged diameter ends of the tube forming an annular, generally radially extending step at the junction of each tube end and interior portions of the tube, at least a portion of each tube end having an outwardly projecting roughened surface on the enlarged diameter of the tube end, and the plastic roller body being integrally molded over both the steps formed by the large diameter ends of the tube and over the roughened surfaces on the tube ends such that the steps and the roughened surfaces of the tube ends keep the integrally molded roller body from sliding or stripping off the tube.