An overhaul and maintenance company for underground trains in the UK had a requirement to reduce service costs of traction motor bearings by increasing the time between overhauls whilst maintaining reliability. A review of greasing procedures at initial build and maintenance was undertaken by NSK Engineers, with improvements proposed, accepted and documented. Additionally, NSK performed a Condition Analysis of bearings that had completed 6 years in Service. Using this information combined with NSK bearing lifetime analysis techniques, the overhaul period was increased from 4.5 years to 5.5 years, aligning with other components on the train.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|4,5 years overhaul cycle;
|€ 756.000||5,5 years overhaul cycle;
New procedures extended service life by 1 year and reduced 30 machines per year overhaul
|Total Costs||€ 756 000||€ 616 000|