Abstract: A shredding machine having a housing, a first and a second parallel spaced apart rotatably driven shafts rotatably mounted in the housing at end plates fixedly attached to the housing, driving means in the housing and operably connected to the shafts to drive the shafts counter to each other, a plurality of interfitting cutters having annular cutting surfaces disposed on the shafts and locked against rotation on the shafts by locking means, at least two support rods fixedly attached at their ends to the end plates, the support rods being parallel to each other and to the first and second shafts, a comber interposed between each of the cutters, each comber having at least two openings therethrough, one support shaft in registration with and of slightly smaller diameter than one of the openings to provide mechanical support for each comber, the first and second shafts in registration with and of slightly smaller diameter than another of the openings in each comber to provide further mechanical support for each