Cat® Rotary Wheel Seals are circular seals made of rubber. These seals are used for fluid retention and extreme contamination exclusion in heavy duty applications operating in severe and harsh environments. The unitized design eliminates the need for proper shaft surface finish and hardness. The edges may or may not be rounded according to the application needs. Seals and Rings are made from materials that are matched to the fluids, temperatures, and pressures found in Cat® engines and machines. The materials resist wear and extrusion, and provide superior resistance to seal compression set. Dimensions of our Seals and Rings are consistently held to tight tolerances to ensure they fit properly into seal grooves with the necessary seal compression. Cat® Sealing systems protect more expensive parts from leaks and contamination. Protect your investment with Genuine Cat® Seals.Application:Cat® Shaft Seals are used in Cat® Axle systems for retaining the grease or oil. Consult your owner's manual or contact your local Cat® Dealer for more information.