Application: Rolling Mills - Diverter roll

A UK steel manufacturer experienced frequent failures of the bearings in a diverter roll. Unplanned bearing failures often caused the diverter rolls to be scrapped. As a consequence of the seized bearing the product was scored requiring rework or rejection. NSK engineers worked together with the distributor to identify that a change of service caused larger heat transfer to the spherical roller bearings which resulted in degradation of the grease and bearing failure. NSK suggested to use a larger clearance bearing and a high temperature lubrication. As a result the bearing life increased to more than 12 months.