| 摘要 |
A hub bearing unit comprises a rotatable annular element (11) for mounting a wheel, and a stationary annular element (13) to be mounted to the vehicle and defining a rotation axis (x) for the rotatable element (11). The rotatable element has a radial flange (11b) with a radial surface (11c) for axially resting against a brake rotor (16). The stationary element (13) is held in a determined position by means of non rotating retaining means (120, 121) of a machining apparatus to orient the rotation axis (x) in a determined direction. The rotatable element (11) is then rotated relative to the stationary element (13) about the rotation axis (x), simultaneously machining the radial surface (11c) so as to obtain a finished surface oriented perpendicular with respect to the rotation axis (x)
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