Blank and manufacturing method thereof of the bearing ring member, manufacturing method and bearings of the bearing ring member

A cutting object surface after forged stainless steel with a uniform surface properties, provides a blank structure of the bearing ring member that allows cutting precision. Cylinder blank 10 is machined to the outer ring 2 and inner ring 3 of the bearing, is formed by forging a material stainless steel, and the inner peripheral surface 11a, 12a and the outer peripheral surface 11b, and the entire surface of the 12b surface eutectic carbide subdivided layer and parts 11 and 12, and a clamp portion 13 provided on one end side of the cylindrical portion 11 and 12.