the inner race 3 and the lip 25 this latter is resiliently deformed and exerts with the end 35 and onto the surface 15 a radial pressure proportional to its own deformation thus providing a sliding seal between the races 2 and 3 of the bearing 1 which move relative to one another in the case in which the movable element is the inner race 3 the bevel 31 and the concave surface 11 of the face 9 foster centrifugal action exerted in respect of the contamination agents and in respect of the lubricant contained within the bearing moreover the concave shape of the said surface reduces the overall dimensions of the member 6 in respect of the balls 4 from the foregoing are clearly apparent the advantages of the present invention in particular in the case of the embodiment shown in fig2 it is possible to obtain a seal between two elements movable relative to one another such as the races 2 and 3 of the rolling bearing 1 whose efficiency is equal or little inferior to that which is obtainable in the present sealed bearings but free from the disadvantage of the kinetic loss by friction caused by the contact between the lips and the surface of the inner race inasmuch as such contact does not exist moreover if because of the working tolerances there is an interference between the lips 24 25 and the race 3 this interference produces an increase of the rolling friction between the races but does not alterate the surfaces inasmuch as since the said.