Patent ID: 7896553

Claim:
A bearing device for a wheel for rotatably supporting the wheel relative to a vehicle body, comprising an outer member having an inner periphery formed with double rows of first raceway surfaces; an inner member having second raceway surfaces opposed to the first raceway surfaces, wherein the outer member and inner member are formed of forged component parts; double rows of rolling elements interposed between those opposed first and second raceway surfaces of the outer and inner members; and an IC tag capable of accomplishing a communication on a contactless basis wherein the IC tag is affixed to a not mechanically processed surface of at least one of the forged component parts, wherein the IC tag has recorded therein a history of the manufacturing process and a manufacturing history information, the history of the manufacturing process including steps ranging from a primary machining to grinding by way of induction hardening and secondary machining, the manufacturing history information including the site of manufacture, the date of manufacture, information on processing conditions, inspection results, dimensions after processing and preload.