A large energy producer (electricity + heats) faced frequent failures on their water recirculation centrifugal pumps. NSK jointly with the local distributor performed a bearing failure investigation on site. The result showed that the lubrication of the pump bearings as the source of repeated failures. NSK proposed to change the bearing type over to a sealed for life greased bearing featuring DDU seals and high temperature grease. This gave significant improvement in performance reducing maintenance costs.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|Cost of bearings used before||€ 1,550||DGBB bearings with DDU seals||€ 480|
|Oil replenishment costs||€ 1,700||Oil replenishment costs||€ 0|
|Maintenance costs||€ 7,200||Maintenance costs||€ 0|
|Downtime costs||€ 19,000||No downtime costs||€ 0|
|Total Costs||€ 29 450||€ 480|