lower section 24 a control actuator sensor 38 is also mounted on the frame 21 in the lower section 24 the operations in the lower section 24 will be described in greater detail below the rotator 28 is shown in greater detail in fig3 the rotator 28 receives a shaft 40 nearest its butt end 44 the shaft 40 is positioned within the rotator 28 and a shaft positioning sensor 42 a plurality of rollers 46 of the rotator 28 hold the shaft 40 in place and also rotate the shaft 40 during the assembly process at least one of the rollers 46 is connected to a gear 48 that is itself connected to a motor 50 the motor 50 may be a servomotor step motor or the like the length of the frame 21 and the distance between the alignment base 30 and the rotator 28 are dependent on the length of the shaft 40 the plunger 26 is shown in greater detail in fig4 the plunger 26 is composed of a shaft engagement member 52 that has a recess 54 and a rod 56 that is connected to a drive mechanism 58 the drive mechanism 58 is preferably a pneumatic cylinder however other means may be utilized to drive the rod 56 such as a servomotor or a stepper motor the plunger 26 oscillates along longitudinal path 59 that is in alignment with the shaft 40 when the shaft 40 is placed within the plurality of rollers 46 during the assembly operation the recess 54 of the shaft engagement member 52 of the plunger 26 will engage the butt end 44 of the shaft 40 the drive mechanism.