SPLINED SHAFT ASSEMBLY WITH PILOTING FEATURES

A shaft assembly having: a first shaft (170) with an inner facing surface having: an inner facing spline (190) extending between spline ends; an inner facing projection, adjacent to one of the spline ends, extending to an inner facing projection surface; and an inner facing projection seat, adjacent to another of the spline ends; and a second shaft (250) having an outer facing surface having: an outer facing spline (270) extending between spline ends; an outer facing projection, adjacent to one of the spline ends of the outer facing spline (270), extending to an outer projection surface; and an outer facing projection seat, adjacent to another of the ends of the outer facing spline (270); the first shaft (170) at least partially surrounds the second shaft (250); the inner facing projection surface is disposed against the outer facing projection seat; and the outer facing projection surface disposed against the inner facing projection seat.