BEARING DEVICE MANUFACTURING METHOD, AND BEARING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a sufficient axial force to each of a pair of inner rings of a double row roller bearing provided on a bearing device with excellent balance. SOLUTION: A double row roller bearing 2 with a plurality of balls 11 interposed in two rows between a single outer ring 10 and a pair of two inner rings 8 and 9 is externally fitted from the other end side of the axial direction of a shaft part 3, and one inner ring 8 is butted to a flange 5 of the shaft part 3. A cylindrical part 6 of the shaft part 3 is caulked while two inner rings 8 and 9 are pressed against the flange 5 by the predetermined axial load P2 from the axial direction to the other inner ring 9, and the double row roller bearing 2 is held by a caulked part 7 and the flange 5. In this caulking step, the ratio P2/P1 of the axial load P2 to the axial load P1 to be given by the caulking is set to be 0.33 to 0.88.