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A customer experiened repeated bearing failures in conveyor rollers. They were changing approximately 36 bearings annually and failures were taking place about every 6 week. Investigations by NSK showed the failures were caused by the ingress of water and hard particulates. NSK recommended replacing the standard bearings with NSK Molded-Oil bearings. A test of the bearings was conducted and no failures have occurred in 2 years. This solution resulted in a significant cost savings.

Key Facts

  • Approx. 26 bearing failures annually
  • Significant number of man hours needed to replace failed bearings
  • Substantial machine down time leading to costly loss of production
  • NSK solution, Molded-Oil ball bearings
  • Productivity improvement
  • Cost saving realized
  • NSK Molded-Oil Bearings

Value Proposals

  • NSK Application Review determined the bearings had failed due to the absence of lubrication and ingress of water and hard particulates
  • Having completed the review NSK recommended the use of Molded-Oil ball bearings
  • A trial using Molded-Oil ball bearings was implemented
  • The trial resulted in a substantial increase in bearing life and reduction of machine down time.

Product Features

  • Molded-Oil provides continuous supply of lubrication oil
  • 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
  • Molded-Oil provides a continuous supply of lubricant achieving extended maintenance-free performance. Also available for high speed applications
  • Available in ball bearing, spherical roller bearing and tapered roller bearings types
  • Stainless steel for corrosive environments.

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Bearing Replacement: Ball bearings $160 Bearing Replacement: NSK Molded-Oil ball bearings $106
Downtime: 8.6 hrs at $3,332/hr $28,655 Downtime: none $0
Maintenance: 8.6 hrs at $26/hr $224 Maintenance: none $0
Total Costs $29,039 $106



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