Abstract: Mechanical coupling for elastic axial and radial constraint with torsional freedom, especially for elastic pivots and suspensions and the like, comprising, according to the invention, a composite tubular member made of metal and elastomer (11) that exhibits high axial and radial rigidity and the ability to absorb vibrations induced by the mechanical system in which it is fitted and to compensate for manufacturing tolerances in that system, and a tubular insert (15), made of nonwear plastic material with a low coefficient of friction which is coaxial and integral, in the form of a fixed inner sleeve, with said composite tubular member (11) and engages with a rotating metallic component (16) fitted coaxially with respect to said tubular insert to provide the torsional freedom.