FLENDER Standard Couplings Highly Flexible Couplings — ELPEX-B Series © Siemens AG 2015 General information ■ Overview ELPEX-B couplings are highly flexible and free of torsional back- lash. Because of their low torsional stiffness and damping ca- pacity, ELPEX-B couplings are especially suitable for coupling machines with a highly non uniform torque pattern. ELPEX-B couplings are also suitable for connecting machines with high shaft misalignment. Standard ELPEX-B coupling types are designed as shaft-shaft connections. Application-related types can be manufactured on request.
■ Benefits The ELPEX-B coupling is suitable for horizontal and vertical mounting positions or mounting positions at any required angle. The ELPEX-B coupling is especially suitable for reversing oper- ation or operation with changing directions of load. The coupling parts can be arranged as required on the shaft ends to be connected. The elastic tire is slit at the circumference and can be changed without having to move the coupled machines. The elastic tire is fitted without backlash and gives the coupling linear torsional stiffness, thus the torsional rigidity remains con- stant as the load on the coupling increases.
If the elastic tire is irreparably damaged or worn, the metal parts can rotate freely against one another because they are not in contact with one another. ■ Application The ELPEX-B coupling is available as a catalog standard in 15 sizes with a rated torque of between 24 Nm and 14500 Nm. The coupling can be fitted with elastic tires made of natural rubber for ambient temperatures of -50 °C to +50 °C and with elastic tires made of chloroprene rubber for -15 °C to +70 °C. The chlo- roprene rubber tire is marked FRAS, "Fire-resistant and Anti- static". ■ Design 10 The ELPEX-B coupling's transmission characteristic is deter- mined essentially by the elastic tire.
The elastic tire is manufac- tured from a natural rubber or a chloroprene rubber mixture with a multiply fabric insert. The elastic tire is fastened to the hubs with bolts and two clamping rings. Materials EN-GJL-250 grey cast iron or steel. Metal part materials In type EBWT, the shaft-hub connection is achieved with Taper clamping bushes, in type EBWN with finish-drilled hubs and par- allel keys. The type EBWZ connects the machine shafts addition- ally via a detachable adapter. Elastic tire material Natural rubber 70 ShoreA 048 -50 °C ... +50 °C Chloroprene rubber 70 ShoreA 068 FRAS -15 °C ... +70 °C 10/2 Siemens MD 10.1 · 2015 Material Hardness Identification Ambient temperature