Patent ID: 8881395

Claim:
A method of increasing the coefficient of adhesion between two rotor parts that are constrained together in rotation, or two turbomachine parts, the parts bearing one against the other via bearing faces and being fastened to each other by bolting, the method comprising: machining at least one of the bearing faces by milling so as to modify a surface state and roughness of the at least one bearing face; and then coating each machined face in a thin layer of a material that is hard and that has a high coefficient of friction, said thin layer having a thickness determined so as to prevent modifying the surface state that is obtained by milling, wherein the milling is performed with a cutter presenting an advance per tooth fz that is determined as a function of the roughness Ra desired for the or each bearing face and as a function of the radius R of the cutter, using the formula: fz =√(18√3)×√( Ra×R ).