Suited for heavy-duty applications, RfN 5571 Series is equipped with shrink discs and can be integrated into machines without any heating or cooling. High torque units are slip fit and come with either hexagon-head or hexagon socket-head cap screws. With backlash-free shaft-hub connections and elimination of additional components such as keyways or shims, couplings are suitable for mining applications, general gearbox designs, and plant manufacturing.