Guide bearing of a rack of a steering system

A guide bearing of a rack for meshing a pinion and the rack of a steering system of a vehicle, the guide bearing comprising a wall, a first portion of the wall being tubular and defining an axis of the guide bearing and an internal channel around the axis, the internal channel opening at a first end of the guide bearing, and opening onto a second portion of the wall opposite to the first end in the axis of the guide bearing, the internal channel having a section transverse to the axis, the section being configured to enable the insertion of the rack inside the internal channel according to an axis of the rack parallel to the axis of the guide bearing, the guide bearing comprising an inner surface of the internal channel of the first portion of the wall of the guide bearing and an inner surface of the second portion of the wall of the guide bearing, the inner surfaces being arranged so as to be in slipping contact with a slipping surface of the rack opposite to a toothing of the rack, when the rack is inserted inside the internal channel of the first portion of the wall according to the axis of the rack, the guide bearing further comprising at least one damping means placed, at least partially, around the guide bearing according to a plane transverse to the axis of the guide bearing, the at least one damping means being arranged on the second portion of the wall, the pinion being positioned opposite the inner surface of the second portion of the wall of the guide bearing so as to mesh the toothing of the rack,

• wherein the at least one damping means comprises a seal having a closed contour, and
• the seal is arranged so as to run in a double groove arranged on the second portion of the wall.