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Introduction

An international manufacturer of angle gears was experiencing frequent and irregular failures on gearboxes fitted to a bus application. NSK investigated this and found the bearing arrangement was complex involving many components from alternative suppliers. As a result, NSK proposed a customised solution with an integrated flanged bearing arrangement which simplified the assembly and gave superior performance. A trial proved this to be successful. The solution was adopted by the customer, resulting in reduced parts needed, consistent performance and guaranteed assembly. This gave the customer a significant cost saving with reduced maintenance costs and improved product performance.

Key Facts

  • Bus gearbox
  • Irregular and unscheduled failures
  • Failures through complex and often incorrect assembly of bearings and components
  • Demand for increased service life
  • Trials with NSK flanged bearing units
  • Approval of NSK product and adaption into production
  • Result: reduction of assembly costs and labour costs
  • Bus drive gear
  • NSK Flanged Bearings for gearboxes

Value Proposals

  • NSK’s investigation showed that problems arose during installation of the bearings 
  • NSK training of employees in the installation and removal of bearings
  • Special NSK design solution using flanged bearing units
  • Reduction of assembly costs and labour costs
  • Great improvement in the bearing performance and reliability
  • Cost savings of approx. €37,667 per annum

Product Features

  • 35° contact angle for high axial forces
  • Compact design
  • Special shaft seal with vent hole
  • Negative operating clearance
  • Housing coated against rust
  • Housing sealed by O-ring

Cost Saving Breakdown

Before Cost p.a. NSK Solution Cost p.a.
Bearing costs (incl. parts) €112.000 Costs of NSK flanged bearings €146.000
Assembly costs (4.000 x 466h) €16.333 Assembly costs (4.000 x 133h) €4.666
Labour costs for replacing bearings €60.000 Labour costs for replacing bearings €0
Total Costs € 188 333 € 150 666

Reference:SS-E-1004