I was wondering whether the following could be of any help (it mentions "tail ends", I thought who knows, might have something to do with codacci)

Pinch roll units are conventionally employed in rod mills to propel smaller diameter products through water boxes, and to propel larger diameter products through the laying heads. Alternatively, pinch roll units can be employed to retard and brake the movement of bar products being directed to cooling beds, and to prevent the tail ends of rod products from accelerating after they leave the last mill stand and before they arrive at the laying heads.