Low frequency torsional vibration damper having a formed hub

A frequency torsional vibration damper comprising:

• an annular inertia member defining a first annular recess for receiving an elastomeric O-ring in a radial outer surface or a radial inner surface thereof and defining generally opposing secondary annular recesses for receiving elastomeric O-rings in opposing top and bottom surfaces thereof, the opposing secondary annular recesses being positioned proximate whichever of the radial outer surface or the radial inner surface has the first annular recess;
• a plurality of elastomeric O-rings, one each seated in the first annular recess and the opposing secondary annular recesses;
• and
• a hub defining an annular receptacle with opposing sidewalls that each comprise a plurality of spaced apart tabs;
• wherein the annular inertia member is seated in the annular receptacle with the plurality of spaced apart tabs permanently deformed against the plurality of elastomeric O-rings, thereby operatively coupling the hub to the inertia member for rotation together;
• wherein when the inertia member defines the outer diameter of the torsional vibration damper, the hub is mountable on a shaft, and when the inertia member defines the inner diameter of the torsional vibration damper, the hub is mountable inside a shaft.