The present invention relates to a
helical ring (100) comprising a polygonal body (110) and a plurality of cylindrical radial housings (150) arranged in said body, each housing (150) having a surface adapted to receive support means of a blade of a
helix, characterised in that the surface of each housing (150) is arranged on a radially internal surface (201) of a corresponding hub (200), each hub (200) being a separate piece attached to the body (110) of the ring, intended to be received in a radial housing (21) of the latter, and in that it also comprises two projecting pins (32) relative to its external surface to be fastened to the edges of a housing of the annular body, the two projecting pins forming a
centring axis.The invention also relates to a manufacturing process of such a ring, a
helix and a turbomachine fitted with such a ring.