Beam couplings connect rotating shafts and accommodate axial motion and parallel or angular shaft misalignment. They have a low maintenance, one-piece design that provides large misalignment capabilities. ... Common uses for beam couplings include encoders, pumps, and a range of other light-duty mechanical applications.
Couplings are mechanical components used to connect two in-line shafts to enable one shaft to drive another at the same speed. A coupling can be rigid or flexible, allowing various amount of angular, radial, and axial misalignment between the two shafts.