Smart Precision: Page 3

Afurther advantage of the described direct clamping method for the flexible steel bellows is the optimum centring of the bellows to the customer shaft. This again helps the coupling to run smoothly and also increases the already high permitted lateral misalignment values. In contrast, conventional radial clamping hub installations lead to radial misalignment on the shaft totalling half the tolerance backlash, which additionally reduces the running quality of the coupling on the shaft, and which adds to possible lateral misalignment.

Whatever the system advantages, steel bellows couplings are in themselves a technical compromise. They reach their limits under extreme demands with regard to torsional spring rigidity or damping of vibrations in critical applications. Therefore, mayr power transmission offers three very different backlash-free shaft couplings with very different characteristic features (Fig. 3). If maximum torsional spring rigidity is demanded of a coupling, the spring steel disk couplings such as the ROBA-DS are the optimum choice. They are capable of transmitting torques backlash-free and with high torsional rigidity even over longer distances. In this way, the misalignment capability of the coupling and the occurring restoring forces are directly dependent on the coupling construction length. Several types of shaft-hub connections such as shrink disk hubs, clamping hubs or key hubs are available to the customer as an interface to the shafts for the connected aggregates.