Mood, Industries, 1600x230


A producer of frozen pizza was facing regular bearing failures with a belt tensioner on a food conveyor belt. The cleaning process of the production line with water was causing corrosion, grease washout and seal damage. The production line had to be stopped every 4 weeks in order to change the bearings. NSK reviewed the application and investigated the problem. NSK recommended to replace the exisiting bearings by Molded-Oil bearings. This resulted in a significiant lifetime extension and cost saving.

Food - Beverage, belt tensioner, conveyor
  • Production line of frozen pizza
Deep Groove Ball Bearing, Spacea, Molded-Oil, High-Speed, 2Comp
  • Molded-Oil bearings

Key Facts

  • Frequent bearing failures occuring every 4 weeks
  • Water ingress from frequent wash down resulting in lubricant degradation, seal damage and corrosion of the rolling elements and raceways
  • NSK Solution: Stainless Steel Bearings with Molded-Oil lubrication
  • Significiant life time increase

Value Proposals

  • NSK Application Review determined the bearing failure was due to degradation of the lubricant and ingress of water
  • NSK recommended the use of Stainless Steel Bearings with Molded-Oil lubrication
  • Molded-Oil bearings use an oil impregnated polymer as the lubricant instead of grease
  • The polymer matrix slowly releases oil to lubricate the bearing, while at the same acting as a barrier to protect the bearing from contamination. The lubricant cannot be washed out as with standard greases and therefore the life of bearings in wet environments can be increased significantly
  • A trial resulted in a substantial increase in bearing life and a reduction of the machine down time

Product Features

  • Molded-Oil provides continuous supply of lubricant
  • Grease-free property with no oil refilling keeps operating environments clear
  • Operating life more than twice as long as grease lubrication, in water or dust contaminated environments
  • Contact-seal type available in standard inventory for ball bearings
  • Achieves extended maintenance-free performance through constant supply of lubricant; availble for high speed applications
  • Available in ball bearings, spherical and tapered rolling bearings
  • Stainless steel for corrosive environments
Cost Saving Breakdown
Before Cost p.a. NSK Solution Cost p.a.
Bearing Costs: Bearing replacement every 4 weeks € 2.160 Bearing Costs: Bearing cost € 1.800
Lubrication Costs: Relubrication of bearings € 600 Lubrication Costs: No relubrication € 0
Engineering Costs: Maintenance costs € 14.400 Engineering Costs: No maintenance costs € 0
Total Costs € 17 160 € 1 800