Rock crushers are used in one of the first steps of cement production for the coarse grinding of the raw material mined as crushed material, e.g. limestone or iron ore. The throughput of large plants that are mostly in operation round the clock can be several thousand tonnes of rock per hour. Correspondingly massive is the stress in the form of bending torques, radial loads, the formation of dust and dirt, to which the locking devices utilised to connect the crusher roll and the rotor shaft are continuously subjected. RINGFEDER® supplies perfectly suitable locking assembly and shrink disc solutions, always taking into consideration the application-specific conditions with regard to the size of the plant and its capacity, the type of rock and its hardness, speeds and torques, shaft diameters as well as important environmental factors. This contributes significantly to ensuring the effective and trouble-free operation of individually different crushing facilities – since operational disorders or even failures involve huge costs and must ideally be entirely avoided.