METHOD FOR MANUFACTURING A HUB UNIT BEARING

To achieve a method that is capable of more accurately controlling a preload applied to rolling bodies. An amount of decrease ΔC in an axial clearance of a hub unit bearing 1 is found based on an amount of expansion ΔD of an inner ring, which is the difference between the outer-diameter dimension D of the inner ring 13 after the inner ring 13 is externally fitted with a tubular fitting portion 17 of a hub spindle 14 and after formation of a swaged portion 19, and an outer-diameter dimension Do of the inner ring 13 before the inner ring 13 is externally fitted with the tubular fitting portion 17.