An abattoir was experiencing frequent breakdowns due to bearing failures on a band saw application. Two bearings in back-to-back configuration were mounted on each band saw wheel, which supported the cutting blade and rotated at 1500rpm. Water ingress caused corrosion on the running surfaces and lubricant was degraded from the daily mashine wash. Due to this the bearings had to be replaced 8 time per year. NSK reviewed the application and investigated this problem. NSK recommended to replace the existing bearings by stainless steel Deep Groove Ball Bearings with DDU seals and Molded-Oil lubrication. This resulted in a significant lifetime extension and cost saving.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|Old bearing design||€ 525||New bearing design||€ 248|
|0,5 hrs downtime x 8 times/year x €586/hr||€ 2.344||No downtime||€ 0|
|1 hr fitting time x 8 times/year x €25/hr + frequent blade failure cost||€ 942||Initial fitting time 1 hr x 25/hr + normal blade replacement cost||€ 135|
|Annual lubrication cost||€ 1.945||No re-lubrication||€ 0|
|Total Costs||€ 5 756||€ 383|