Disc couplings operate by transmitting torque via curved disc factors. It operates by pressure and compression of chord segments on a typical bolt circle bolted alternately between the push facet and the travel aspect. These couplings normally consist of two hubs, two-disc packs, and a heart member. One disc assemblies accommodate angular and axial misalignment. Two-disc assemblies are necessary to accommodate parallel misalignment. Allows angular parallel and axial misalignment, is a accurate finite conclude float design, zero-backlash design, large velocity rated and balanced