faces referred to as friction faces wear in contact with the disc linings a wear take up device 10 is provided the wear take up device comprises a unit 10 and ramp means 54 disposed circumferentially more precisely these ramp means 54 consist of a ring made of cropped and pressed sheet metal so as to have ramps 56 disposed circumferentially the said ring also has abutment areas 14 consisting of the rounded top edge of dished parts in the form of arcs of a circle centred on the axis of the clutch and placed radially towards the outside with respect to the ramps 56 fig2 and 17 the pressure plate 51 has here made by moulding on its face turned towards the base of the cover 52 radially beyond the small columns 58 studs 57 distributed circumferentially at a distance from each other which corresponds to that which circumferentially separates two successive ramps 56 the studs 57 being intended to cooperate each with a ramp 56 the flange 152 has areas offset axially in the direction of the base of the cover in order to carry balancing rivets 1 fig5 in order to balance the clutch mechanism including in a.