Abstract: An operating method for a grinding body mill having a housing which surrounds a grinding chamber in which grinding bodies are arranged and, during normal operation, are set in motion for the purpose of grinding a grinding stock to be ground, which housing includes a product inlet and a product outlet, between which the grinding stock to be ground flows through the moving grinding bodies, wherein, by means of a separating device positioned upstream of the product outlet, grinding bodies are prevented from exiting the grinding chamber into the product outlet during normal operation of the grinding body mill, and wherein furthermore, grinding bodies that have passed through the separating device and onward through the product outlet pass into an upwardly inclined discharge pipe from where, when the grinding body mill is at a standstill, the grinding bodies are directed out of the discharge pipe through the product outlet into a rotor body of the separating device and, when operation of the grinding body mill is

Abstract: Machine having a rotor which is mounted in a cantilevered fashion on a bearing and has a rotational axis along which a free, subsequently non-mounted rotor end runs starting from the bearing, the rotor end having a rotor end side which is spaced apart from a fixed rotor opposing side by a gap, and which, during operation of the machine when the rotor is rotating, is deflected with respect to the rotational axis as a result of imbalance of the free, non-mounted rotor end, or as a result of externally applied forces, wherein the rotor end side is curved or beveled so as to drop away at least in its end region towards its edge and in a direction towards the bearing.