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Introduction

An international car manufacturer experienced increasing temperatures of their Spherical Roller Bearings in an exhaust ventilation application. NSK was asked to find a solution to this problem in order to reduce temperature generation. NSK Engineering carried out an Application Review including a temperature survey revealing high preload leading to significant temperature increase. NSK suggested using NSK Spherical Roller Bearings. In addition NSK recommended a Training “Application of NSK Bearings”. A trail was conducted, resulting in a considerable temperature reduction.

Key Facts

  • Exhaust Ventilation Application
  • Temperature increase leading to early bearing failure
  • NSK’s solution: Using NSK Spherical Roller Bearings.NSK Training “Application of NSK Bearings”
  • No temperature increase and therefore no bearing failures for more than 12 months
  • Productivity improvement
  • Cost saving generated
  • Exhaust Ventilation
Spherical Roller Bearings - CAM Cage
  • NSK Spherical Roller Bearing

Value Proposals

  • NSK engineering conducted a Bearing Failure Analysis showing high bearing preload leading to temperature rise
  • NSK suggested using Spherical Roller Bearings and a training "Application of NSK Bearings" for the staff
  • A trail was agreed which resulted in an increase of bearing life from 6 month to over 12 months
  • The implementation of the NSK recommendations has been supervised by the NSK engineering team
  • The customer benefited from increased productivity and reduced maintenance costs
  • No bearing failure for over 12 months
  • Cost saving was realised

Product Features

  • Highest load rating SRB's
  • High load rating enables downsizing
  • Optimum raceway design & surface finishing
  • Brass cage design (CAM) or strengthened steel cage (EA)
  • Lower maintenance cost and improved productivity
  • Temperature stability: up to 200° C
  • 40 mm to 260 mm bore size
  • Up to twice the operating life
  • Up to 20% higher limiting speed
  • Dynamic load rating: 25% higher

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Mounting - Dismounting € 1.000 No mounting costs € 0
Production downtime € 14.000 No production downtime € 0
Total Costs € 15 000 € 0

Reference:SS-E-1017