Gearbox Reliability Collaborative Gearbox 3 Planet Bearing Calibration

Research output: NRELTechnical Report


The Gearbox Reliability Collaborative gearbox was redesigned to improve its load-sharing characteristics and predicted fatigue life. The most important aspect of the redesign was to replace the cylindrical roller bearings with preloaded tapered roller bearings in the planetary section. Similar to previous work, the strain gages installed on the planet tapered roller bearings were calibrated in a load frame. This report describes the calibration tests and provides the factors necessary to convert the measured units from dynamometer testing to bearing loads, suitable for comparison to engineering models.
Original languageAmerican English
Number of pages20
StatePublished - 2017

NREL Publication Number

  • NREL/TP-5000-67370


  • calibration tests
  • dynamometer
  • gearbox
  • Gearbox Reliability Collaborative
  • wind energy


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