Abstract: The invention proposes a device using friction in a liquid medium having a support, notably metallic, on which an interface surface forms a support for a friction lining, with a flat annular shape overall, produced from a friction material which has a porous structure with communicating cells and which has areas (M1, M2, M3) with different controlled porosities. The method of manufacturing the friction lining including a step of moulding under pressure, whilst the interface surface of the support has at least one groove in which there extends the friction material moulded under pressure in order to constitute an area of controlled porosity (M1, M2) greater than the mean porosity (M2, M3) of the body made from friction material constituting the lining.