Uptower Investigation of Main and High-Speed-Shaft Bearing Reliability

Research output: NRELTechnical Report


This purpose of this report is to summarize the investigation of the operational conditions conducive to premature main bearing wear and gearbox bearing axial cracking failures in wind turbines. The report fully describes the series of operations conducted and measurements gathered from commissioning of the instrumented drivetrain in January 2017 through the end of the wind season in May 2018.
Original languageAmerican English
Number of pages50
StatePublished - 2019

NREL Publication Number

  • NREL/TP-5000-71529


  • axial cracking failures
  • gearbox
  • high speed shaft
  • wind energy
  • wind turbines


Dive into the research topics of 'Uptower Investigation of Main and High-Speed-Shaft Bearing Reliability'. Together they form a unique fingerprint.

Cite this