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A large producer of fish products was experiencing repeated failures on their Scraped Surface Heat Exchangers. They were changing bearings every 8 weeks which involved high maintenance costs and a lengthy machine down time. NSK investigated and determined that hard contaminants were entering the bearing causing failure. They proposed a testing of NSK Molded-Oil bearings which resulted in immediate improvement and significant increase in beairng life.

Key Facts

  • Frequent bearing failures occured every 8 weeks on 5 machines
  • Approximately 60 man hours annually were needed to replace failed bearings
  • Substantial machine down time, 5 hours per bearing change
  • NSK solution, Molded-Oil Deep Groove Ball Bearings
  • Significant bearing life improvement resulting in no failures over a 3 year period
  • Productivity improvement
  • Scraped Surface Heat Exchanger Unit
  • Molded-Oil Bearings

Value Proposals

  • Following repeated and costly failures the customer required a solution to their problem 
  • A failed bearing analysis determined that the failures were due to water and hard particle ingress resulting in lubrication breakdown
  • A test was proposed using NSK Molded-Oil Deep Groove Ball Bearings which proved to be successful with life being extended to over 3 years
  • Molded-Oil bearings were fitted to all machines resulting in a reduction in machine down time and maintenance cost 

Product Features

  • Available for high speed applications
  • Available in ball bearing, spherical roller bearing and tapered roller bearings types
  • Rust-proof - Stainless steel for corrosive environments
  • Grease-free property with no oil refilling keeps operating environments clean
  • 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 as Molded Oil provides a continuous supply of lubricant

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Bearing Replacement: Ball Bearings $320 Bearing Replacement: NSK Molded-Oil Deep Groove Ball Bearings $240
Downtime: 12 failures @ 5 hours each: 60hrs @ $1,332/hour $79,920 Downtime: none $0
Maintenance: 12 failures@5 hours each= 60hrs @ $67/hour $3,997 Maintenance: none $0
Mechanical Seals x 12 $19,990 Mechanical Seals x 1 $1,665
Total Costs $104,227 $1,905



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