Composite Disc Couplings

With more than 50,000 Rexnord Addax Composite Couplings installed around the world, Rexnord has more experience than any other composite cooling tower coupling manufacturer. These couplings are made with lightweight, advanced composite material to increase critical speed, reduce vibration and extend bearing life. As a result, they can reduce overhung bearing loads up to 80% compared to alternative metal couplings. Rexnord Addax Composite Couplings are designed to your specifications and made to order.

Features & Benefits


  • Corrosion-resistant parts lower cost of ownership and extend service life

  • Can span from motor to gearbox without intermediate support bearings

  • Up to 5.06 inches (130 mm) bore capacity

  • Up to 36,200 in-lb (4,090 Nm) torque capacity

  • Up to 500 hp

  • Custom spacer lengths up to 275 inches (6,985 mm)

  • 13 sizes available

  • Patented unitized flex elements eliminate fretting

  • Ships in less than 24 hours if required

technical title


  • The Rexnord Addax composite disc coupling is a high performance disc coupling featuring high-strength composite material, corrosion resistant, unitized flex element with high misalignment capacity critical for harsh operating conditions found in cooling tower applications. The Addax composite disc couplings are dynamically balanced to meet ANSI/AGMA 9000-C90 (R96) - Class 9 specifications. Addax disc couplings are available in 13 sizes ranging from 350.275 through 850.1275 models. The Addax composite coupling is engineered to accomodate continuous torque loads up to 36,200 lb-in (4090 Nm) and shaft diameters up to 12.75 inches. Click below to configure the Addax composite disc coupling specific to your application