Cat drive train components must endure incredible torque, high impact loads, and frequent direction and gear changes. Cat designs and manufactures its transmissions and final drive components with these demands in mind. The result is a drive train that lasts longer and works harder over the life of the machine.Attributes: Steel universal joint assembly "Lube for Life" design Pilot diameter: 212.74 mm (8.375 in) after installation Swing diameter: 225.55 mm (8.879 in) after installation With dust shields, spider, seals and bearingsApplication:Cat universal joint assemblies are used to transmit rotary motion from shaft to shaft in Cat drive train systems.