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Introduction

A customer was experiencing repeated bearing failures in conveyor rollers on the Main Make-Up conveyor within a bakery. They were changing approximately 36 bearings annually and bearing failures were taking place at about 6 week intervals. Investigations by NSK showed the failures were caused by the ingress of water and hard particulates. NSK recommended to replace the standard bearings with NSK Molded-Oil bearings. A trial was implemented and since commissioning, no failure have occurred in 2 years, resulting in a significant cost saving. This trial is still ongoing.

Key Facts

  • Frequent bearing failure resulting in approximately 36 bearings being replaced 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 realised
Bakery conveyor
  • 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 dustcontaminated 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; 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.
Previously used ball bearings € 150 NSK Molded-Oil ball bearings € 99
8,6 hrs at € 3.125/hr € 26.875 No downtime € 0
8,6 hrs at € 25/hr € 215 No service required € 0
Total Costs € 27 240 € 99

Reference:SS-E-2054