A line of spring couplings have been developed by Torsion Control Products (TCP) and are specifically for modern diesel engines as used, for example, in construction machines and agricultural vehicles. These products attenuate torsional vibration, isolate resonance, protect against overload and shock, reduce noise, improve the service life of bearings and gears, and increase system durability. The spring couplings from US manufacturer TCP further extend the comprehensive product range of the Timken Mechanical Power Transmission Group.