A unique rotor assembly for an electrical machine is disclosed herein. The rotor assembly includes a shaft having an axis of rotation extending within the electrical machine. A central support is connected to the shaft at an intermediate position and a pair of opposing end plates are configured to clamp a plurality of laminate plates therebetween. The laminate plates and a sidewall of the end plates have a non-linear cross-sectional shape such that radial loading due to centrifugal force is transmitted from the laminate plates to the end plates during operation.