Roller bearing with air passage in a bore provided with flutes

A roller bearing for the rotational guidance of a motor vehicle wheel, the bearing comprising a rotating inner member on which the wheel is intended to be associated, a fixed outer member intended to be fixed to the chassis of the said vehicle, and rolling bodies disposed between the members so as to allow the relative rotation of the members about an axis (A), the inner member comprising a bore on the periphery of which axially extending flutes are provided so as to allow the rotational coupling of a fluted shaft with the inner member by the fitting of the shaft in the said bore, the bearing comprising a path forming an air passage between the outside of the fixed member and the front face of the rotating member, the path comprising at least one outer channel and at least one inner channel designed to pass respectively right through each of the members, the bearing being characterised in that, in combination, the path also comprises a groove formed by the omission of at least a front part of at least one flute, from an intermediate zone of the bore as far as its front face, and the downstream end of the inner channel opens out in the groove.