A quarrying company was experiencing short service life on its conveyor tail drum take-up unit. Located in an inaccessible area beneath a shaker screen, the unit´s bearings were subjected to particularly arduous conditions due to elements in the environment. This situation was compounded by the fact that regular re-greasing was a difficult task due to the remote bearing location. This lead to regular bearing failure and costly conveyor downtime. NSK analyzed the bearing application and determined that water and grit were entering the bearings and causing failure. A trial was suggested using RHP Self-Lube® with Triple Lip Seals. This solution extended the service life from 4 months to over 1 year.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|Old bearings per conveyor||$186||New bearings||$67|
|Bearing life: 4 months
3 hours loss of production on failure @ $1,028/h (3 per year)
|$9,252||Bearing life: Ongoing
No loss of production since build
|Maintenance costs: 3 x $73/h (3 per year)||$660||Maintenance costs (original build)||$220|