Description:Brake disc (# 8R-7777) is used in the service and parking brake and is designed to provide a long service life. Cat brake discs work with brake pads in braking systems, providing critical friction to slow, stop or hold a machine stationary. 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 brake disc• Mounting Hole Diameter: 16.7 mm (0.657 in) (10X)• Inside Diameter: 95.3 mm (3.752 in)• Outside Diameter: 457.2 mm (18.000 in)• Thickness: 12.7 mm (0.500 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.