Roller bearing with overmoulded flange

A rolling bearing support (26) comprises an outer metal bearing ring (32) defining a rotation axis (100), and a flange (47) provided with a housing (53) for the outer ring (32) and a cylindrical or conical centering bearing surface (56). The flange (47) comprises a body made of filled composite material (46) overmoulded onto the outer ring (32) and onto a metal sleeve (58) forming the cylindrical or conical bearing surface (56).