Method and device for manufacturing bearing unit

A method of manufacturing a rolling bearing unit in which an end surface of an inner ring is pressed in an axial direction with a caulking section formed by plastically deforming a cylindrical section, which is formed on an end portion of a hub main body in the axial direction, outward in a radial direction in order to apply a coupling force, which is directed toward one side of the hub main body in the axial direction, with respect to the inner ring fitted onto the hub main body,

• the method of manufacturing the rolling bearing unit comprising:
• a process of processing the cylindrical section into the caulking section by plastically deforming the cylandrical section, which is formed on the end portion of the hub main body in the axial direction, outward in the radial direction by rolling each of a plurality of rollers in a circumferential direction about a central axis of the hub main body, by pressing a rolling surface of each of the rollers against a plurality of forming die elements of a forming die in sequence, and by sequentially pressing each of the forming die elements against the cylindrical section in the axial direction, the forming die for forming the caulking section being formed by combining the plurality of forming die elements that are disposed side by side in the circumferential direction about the central axis of the hub main body and that are arranged to be displaceable in the axial direction independently of each other.