FLUID POWER: New CD Couplings® from Zero-Max provide the ideal combination of high dynamic load capacity and high torsional stiffness to ensure reliable system operation in fixed displacement hydraulic pumps driven by servo motors. They are designed so the working part is made of a composite material. The composite disc design withstands the punishment and stress of a servo motor. CD Couplings® are available in single and double flex aluminum hub models with or without keyways. The single flex models have a torque capacity range from 40 to 1,436 Nm and beyond with speed ratings from 4,400 to 17,000 rpm. All CD Couplings are environmentally friendly and manufactured of RoHS-compliant materials.