Lower guide bar for three-point connecting link between tractor and work machine has hardened surface and joining elements

摘要

The elongated flat iron lower guide-bar (1) part (3) has, at its opposite ends, elements (2,4) joining the tractor and work machine. The lower guide bar part is hardened solely on its surface over at least one length. The lower guide bar part is heated over its surface by induction and its surface parts quenched so as to harden it