Material utilization of scrap tires demand shreddering of the tire. In the case of production of granulate the shredder process can be single-leveled. For the production of rubber meal various grinding procedures are applicable. Common to all grinding procedure is an obligatory pre-treadment process in which the material is chopped into small pieces and the rubber and steel parts are separated. Rubber granulate and meal are utilized in floor coverings and mats, but can also be used in road construction.