Patent ID: 7435308
Filing Date: 2008-10-14
Classification: C22C,F16C,Y10S

Abstract:
1. A rolling bearing comprising: an inner ring and an outer ring; and a plurality of rolling elements rollably disposed between the inner ring and the outer ring, wherein at least one of the inner ring and the outer ring being made of steel, the steel including: carbon in the range of 0.95 to 1.25% by mass; silicon in the range of 0.7 to 2.5% by mass; manganese in the range of 0.1 to 1.5% by mass; chromium in the range of 0.5 to 3.0% by mass; molybdenum of 1.5% by mass or less; oxygen of 9 ppm or less; titanium of 30 ppm or less; sulfur of 80 ppm or less; rating number of Thin A series inclusion of 1.5 or less and rating number of Heavy A series inclusion of 1.0 or less, wherein the rating numbers are measured by a method stipulated in ASTM E45, and wherein hardness of the inner ring and the outer ring are HRC 59 or more.