Journal of Failure Analysis and Prevention

, Volume 12, Issue 5, pp 575–580 | Cite as

Electrical Fluting Failure of a Tri-Lobe Roller Bearing

Technical Article---Peer-Reviewed

Abstract

A tri-lobe cylindrical roller bearing possessing excellent orbital slippage resistance was submitted to GE-Poland Materials Laboratory for examination of uniformly spaced axial fluting damages observed on both the rollers and outer raceway surfaces. The bearing was fabricated from premium-melted M50 and M50NiL commonly used in aircraft quality bearings. Detailed investigation of the raceway and rollers revealed a high density of microcraters associated with local melting and material removal attributed to passage of electrical current through the bearing during operation. The effect of the electrical discharge on crater dimensions and density based on a thermoelectric phenomenon is discussed in this article.

Keywords

Electrical fluting Electrical erosion Tri-lobe bearing Cylindrical bearing 

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Copyright information

© ASM International 2012

Authors and Affiliations

  1. 1.Materials & Process Engineering DepartmentGE AviationWarsawPoland
  2. 2.Materials & Process Engineering DepartmentGE AviationCincinnatiUSA

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