The ATOX raw mill entered in service in the 80s of the 20th century and since then maintenance has been periodically carried out. The analysis of the most recent failures registered allowed to conclude that the pull rod failed four times between 2014 and 2015, namely on 09/04/2014, 20/06/2014, 11/08/2014, 05/08/2015, and failures systematically occurred at the top of pull rod no. 1 …