Abstract: Apparatus for aligning the endplates with the core of an electrical generator. To accommodate for relative thermal expansion and contraction between the endplates, having differing coefficients of thermal expansion due to being made of a different material than the core and fingerplates, an endplate variable alignment pin is provided for associating the endplates with the remainder of the core structure. The endplate is able to radial expand or contract in relation to the fingerplate plates in a controlled manner. An eccentric pin is provided to compensate for misalignment between the endplate and the fingerplates at each end of the stator core structure. Radial guide blocks are secured to the fingerplates prior to stacking and bolting of the core, to eliminate the need for in situ welding in constricted areas after core construction.