A major steel producer was not satisfied with the performance of the four-row tapered roller bearings that were installed in its cold rolling mill: steel shavings from the production process were getting into the bearings and having a detrimental effect on reliability. NSK performed a detailed analysis of the bearings on site together with a failed bearing and lubrication review. This prompted a recommendation to utilise NSK’s Tough technology steels which have a far better resistance to damage caused by debris ingress.
|Bearing Life of the previous bearings: 4 months
Lost production costs: € 1.000/h downtime × number of replacements × 4 unexpected downtimes per year
|Bearing Life of the new bearings: 12 months
Lost production costs: € 1.000/h downtime × number of replacements × 1 unexpected downtime per year
|€ 44 000
|€ 17 600