Disc Couplings

Disc couplings, by their definition, are used for the purpose of torque transmission from a driving bolt to a driven bolt through the bolt circle. The torque is transmitted between the two bolts by means of thin, stainless steel discs. As the material between the bolts deforms, misalignment becomes possible. Disc couplings are high performance motion control couplings that are flexible, remain strong and are capable of handling high speeds as well as high torque loads. Disc couplings come in two main styles. Single disc couplings feature two hubs (either aluminium or stainless steel) at each end of the coupling, alongside a flat stainless disc spring. Double disc couplings maintain the two hubs but also boast a central spacer between two disc springs. The central spacer can be constructed from acetal to make the disc coupling capable of electrical insulation. Disc couplings are suitable for use in a variety of applications. Single disc couplings are not able to handle parallel misalignment but disc couplings are useful for many high speed, constant velocity applications. Disc couplings can be found in precision positioning applications that do not require high bearing loads. Disc couplings offer high torsional rigidity but are more delicate than many couplings, so care should be taken not to misuse them.