Abstract: The present invention contemplates a face coupling, and contemplates a gas turbine engine having a face coupling. The face coupling includes a plurality of driving teeth extending from a first component, and a plurality of driven teeth extending from a second component. The plurality of driving teeth and the plurality of driven teeth cooperate to transmit a torque load from the first component to second component. The plurality of driven teeth include a root transition for preventing a driving tooth tip edge from contacting an adjacent driven tooth.

Abstract: One embodiment of the present invention is a gas turbine engine. Another embodiment is a face coupling. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for face couplings. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.

Abstract: A system for balancing a rotatable gas turbine engine component. The system includes two balance rings that are coupled to the component by mating splines on the respective item. Each of the rings has a mass asymmetry that is indexable relative to the primary component to achieve the imbalance correction.