Absolute positioning accuracy, high temperature resistance and flexible applications are the compelling features of RINGFEDER POWER TRANSMISSION‘s torsionally rigid disc couplings.
Whether in test stands, pumps or machining centres – more and more users are relying on torsion-proof multiple-disc couplings for the backlash-free and precise transmission of torques; and for compensating for axial, lateral and angular misalignments.
When developing the GERWAH® torsionally rigid disc couplings, RINGFEDER POWER TRANSMISSION not only attached high importance to typical parameters such as torsional stiffness and high true-running accuracy, but also to compact dimensions and multiple connection options. Depending on customer requirements, the hubs can be attached to the shafts by means of keys, clamping hubs, shrink discs or locking assemblies. All models are available as single or double Cardan types.
GERWAH® torsionally rigid disc couplings particularly prove their strengths in drives where the positioning accuracy in both directions is of high importance, e.g. in machines with frequent start/stop or reverse operation. Small manufacturing tolerances ensure a high level of true-running accuracy, enabling the use of the couplings even at high speeds and with irregular operating torques.
GERWAH® torsionally rigid disc couplings are made of high-strength steel. The disc pack has been developed with the help of FEM analyses and is made of stainless spring steel. It is connected to the hubs by means of precise sleeves and highly resilient bolts. Per disc pack, a misalignment of up to 1° can be compensated. In addition to the 6-bolt-model, a version with 8 bolts is available for higher torque requirements. Two compact aluminium models are available for low to medium torques.
With nominal torques of up to 260,000 newton metres and shaft diameters of up to 250 millimetres, GERWAH® torsionally rigid disc couplings cover a large range of applications. In addition, they can be used at temperatures of up to 240 degree Celsius, enabling their installation in high-temperature fluid pumps.
When installed horizontally, GERWAH® torsionally rigid disc couplings are also suitable for use in potentially explosive atmospheres. In accordance with EU Directive 94/9/EG (ATEX 95), the couplings in the HS, HD and HC series are complient with and classified as equipment in Group II, Categories 2G/2D. They are approved for use in zones G1, G2, D21 and D22.