A security door assembly is disclosed including a hinge assembly having a first hinge plate having at least a first hinge pin receptacle extending from the first hinge plate, and a second hinge plate having at least a second hinge pin receptacle extending from the second hinge plate. A hinge pin is removably received in a longitudinal direction within the first and second hinge pin receptacles such that the first and second hinge plates are pivotal with respect to one another via the hinge pin. The hinge assembly includes a bearing assembly disposed between the hinge pin and one of the first or second hinge pin receptacles, and a retention member removably extending in a first lateral direction into one of the first or second hinge pin receptacles and engaging the hinge pin.