A torsional vibration damper hub assembly for a motor vehicle engine includes, in an exemplary embodiment, a hub formed from a filled thermoplastic material and having an outer wall. The thermoplastic material includes at least one filler. The assembly can also include a metal sleeve molded into the hub where the sleeve is overmolded with the filled thermoplastic material, an inertia ring positioned inside the hub, a rubber insert positioned between the inertia ring and the outer wall of the hub, and an end cap coupled to the hub enclosing the inertia ring the said rubber insert inside the hub.