This guide will assist design engineers in understanding the design, manufacture, operation of splined shaft connections. Contents include: Purpose; Scope; Reference; Spline Terms and Definitions; Applications; Operation; Dimensioning; Manufacture; and Bibliography. The guide also features tables on: maximum allowable compressive stress; wear life factor; spline overload factor; misalignment factor; maximum allowable shear stress; fatigue life factor; and equations for spline dimensions, tolerances, and stresses.