female meter such as for example a 6061 aluminum alloy the blank 10 is typically provided with a centrally formed aperture 12 as illustrated in fig2 the blank 10 to be formed is then placed on the upper surface of a die 14 provided with a cylindrical cavity 16 extending from the upper surface of the die 14 to the lower surface thereof the blank 10 is disposed such that the central aperture 12 is coaxial with the cavity 16 a stool 18 is positioned adjacent the lower surface of the die 14 and suitably closes the cavity 16 once the blank 10 is suitably positioned on the die 14 a reciprocating punch 20 is driven axially downwardly causing the metal of the blank 10 to flow between the outer surface of the punch 20 and the inner surface of the cylindrical cavity 16 to form a cup shaped part 22 it will be appreciated that the downward thrust of the punch 20 acts against the stool 18 at the end of the downward forming movement of the punch 20 the punch may be withdrawn and the part 22 removed by either causing upward movement of the stool 18 or removing the stool 18 and permitting the part 22 to be released from the die 14 the cup shaped part 22 is then disposed to travel between the outer rotating forming surfaces of an assembly of three forming rollers 24 prior to passing through the forming rollers 24 a cylindrically shaped mandrel 26 having a plurality of longitudinally extending spaced apart splines 28 is inserted within the cylindrically shaped interior of the cup shaped article 22 until the end of the mandrel 26 typically abuts against the bottom of the cup shaped.