Abstract: A rolling cone cutter earth boring bit is provided with a seal assembly for sealing the bearings of the bit from the abrasive materials in the borehole and retaining lubricant within the bearing area. A rolling cone cutter is rotatably mounted on a cantilevered bearing pin extending from the bit body. A first seal receiving surface is located on said bearing pin. The first seal receiving surface has a first corner. A second seal receiving surface is located on said rolling cone cutter. The second seal receiving surface has a second corner. The seal assembly includes first and second seal units. The first seal unit comprises a first annular substantially rigid ring and a first substantially resilient ring positioned between said bearing pin and said rolling cone cutter. The first resilient ring is positioned in said first corner. The second seal unit comprises a second annular substantially rigid ring and a second substantially resilient ring positioned between said bearing pin and said rolling cone cutter.