in the interior of a forming die for manufacturing elongated twist bodies of non circular cross section is described a prescribed interior portion of the orifice in the die is formed with a cross section corresponding to the cross section of the body the portion of the orifice upstream of the interior forming section is similar to the interior cross section but increases along a spiral path that terminates at the upstream end surface of the die a localized region of the orifice immediately upstream of the interior portion extends generally tangentially to the angle of twist of the twist body application_number US 72378776 A description referring now to the drawing fig1 illustrates an elongated twist body 1 such as in certain types of rotor spindles which may be formed from a suitable blank which may be manufactured with the aid of a drawing die a prior art version of which is indicated at 2 in fig1 the body 1 exhibits a non circular illustratively oval cross section 11 which is depicted schematically in fig1 such cross section effectively rotating about a central axis 10 of the body 1 along a spiral path of constant radius illustrated at 6 in fig2 the angle of twist.