Patent ID: 6063218
Filing Date: 2000-05-16
Classification: C22C,F16C,Y10S

Abstract:
A bearing comprising an inner race and an outer race,at least one of the inner and outer races being integrally formed with a flange which is to be worked by a machining tool,at least one of the inner and outer races of said bearing being made of an alloy steel which consists essentially of:0.5 to 0.65% by weight of C;0.07 to 0.15% by weight of Si;0.05 to 0.35% by weight of Mn;0.25 to 0.55% by weight of Cr;0.0035% by weight or less of B, selectively; andthe balance being Fe,said flange being made to be less than Hv 230 in maximum hardness after being formed by hot forging and cooling to a room temperature in one of the inner and outer races, andat least a race track of said one of said inner and outer races, where a rolling groove for rolling elements or a sliding region for a mating member is formed and hardened, said race track being at least Hv 653 in hardness after a hardening treatment.