Member for guiding a mobile element in oscillation or rotation

A method for manufacturing a guiding member for guiding a mobile element in oscillation or rotation, characterised in that the method comprises the following successive steps:

• a) manufacturing a body made of a metallic material, said metallic material being steel provided with a bore for receiving the mobile element, comprising a grease supply and cavities not connected to the grease supply and distributed discontinuously in the bore and capable of acting as grease reserves;
• wherein the bore has a cylindrical inner surface and defines:
• a bearing surface outside of the cavities and the grease supply, and
• a non-bearing surface in the cavities and the grease supply;
• the bore comprising at least one zone with cavities having a depth of between 2 and 5 mm;
• b) performing a hardening treatment on the bore, at least in said zone, the bore having a superficial layer treated against seizing over a diffusion depth of less than or equal to 0.6 mm, the superficial layer having a hardness greater than or equal to 500 Hv1 over a depth of between 5 and 50 μm;
• c) applying a surface coating to the bearing surface and in the cavities, and applying grease in the bore, at least in said zone, with a quantity of grease in the cavities not connected to the grease supply per bearing surface of between 0.05 and 0.3 g/cm2 in said zone, wherein said grease quantity per bearing surface of between 0.05 and 0.3 g/cm2 does not include the grease contained in the grease supply.