Description:Cat® Ring gear for use in planetary gear sets of final drives. Cat gears have the industry's highest power density, or the amount of power a gear can transmit relative to its size and a re designed with reusability in mind. Cat gears are machined from carefully selected materials to exacting specifications that match the loads encountered in Cat machines.Application:Cat® Ring Gears are built specific to their application to ensure all drive train parts work and wear together as a system. Consult your owner’s manual or contact your local Cat Dealer for more information.