| 摘要 |
A vehicle wheel bearing-hub unit (1) of the type comprising a dual ring of balls (3, 4) in which the radially inner and axially outer race is formed in a separate annular component (5) inserted on the hub (2), where the annular component (5) is axially engaged on the hub (2) by means of an annular end portion (2b') of the hub which is folded by means of cold forming. The surface (5a) of the annular component (5) presents radial roughness means (7) such that in performing the cold forming, the folded portion (2b') is deformed by the roughness means (7) and reproduces the shape thereof, whereby the annular component (5) is secured for rotation with the hub (2). A process to manufacture the above mentioned unit, in which the annular component (5) is inserted on the hub with no radial interference or minimum radial interference. <IMAGE> |
