Roller bearing with air passage in a bore provided with flutes

The invention concerns a roller bearing for the rotational guidance of a motor vehicle wheel, the said bearing comprising a rotating inner member ( 1 ), a fixed outer member ( 2 ) and rolling bodies ( 13 ) allowing their relative rotation about an axis (A), the inner member ( 1 ) comprising a bore ( 10 ) on the periphery of which flutes ( 11 ) are provided so as to allow the rotational coupling of a fluted shaft with the internal member ( 1 ), the said bearing comprising a path forming an air passage comprising an outer channel ( 25 ) and an inner channel ( 26 ) designed to pass right through respectively each of the members, in which, in combination, the path comprises a groove ( 27 ) formed by the omission of at least the front part of at least one flute ( 11 ), from an intermediate zone of the bore ( 10 ) as far as its front face, and the downstream end of the inner channel ( 26 ) opens out in the said groove.