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Introduction

An international steel manufacturer experienced regular failures on bearings in a continuous casting machine. The machine is used in the production of shaped sections and due to that, the bearings have to handle heavy loads. Wear and fatigue were resulting in short bearing. The average bearing life was 124 weeks with 3 failures to date. After an investigation of the application, NSK suggested a durability test with NSK’s SWR Spherical Roller Bearings. SWR bearings are made of specially developed bearing steel, which has a much better wear resistance and resistance against fatigue. 

Key Facts

  • Steel & Metals
  • Continuous Casting Machine
  • Wear and fatigue caused short bearing life
  • Heavy operation conditions
  • Longer bearing lifetime & reduced maintenance costs requested
  • Spherical Roller Bearings with SWR Steel
  • Bearing achieved 60% longer life
  • SWR Roller Bearing and Housing
  • SWR Spherical Roller Bearings

Value Proposals

  • NSK engineers conducted an Application Review including a Bearing Condition Report
  • This resulted in SWR Spherical Roller Bearing recommendation.
  • Recommemded test with SWR Spherical Roller Bearing
  • Bearing reached 60% longer life

Product Features

  • Improved material strength of outer ring
  • Ability to use with or without seals
  • Improved wear resistance - three times compared to AISI 52100 bearing steel
  • Minimized outer-ring friction to extend bearing life
  • Improved flaking life property - five times compared to AISI 52100 bearing steel
  • Material strength improved to prevent breakage of the outer ring after the occurrence of flaking - five times compared to AISI 52100 bearing steel
  • SWR can replace standard SRB without modifying the axle boxes

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Loss of production due to bearing failures $107,204 No production loss $0
Manpower Costs $42,882 No manpower costs $0
Total Costs $150,086 $0

Reference:SS-E-1019

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