Mechanisms that cause roller bearing failure are not well understood and were the subject of a research program conducted by the Association of American Railroads (AAR), Transportation Test Center, Pueblo, Colorado. The program was funded by the Federal Railroad Administration under Task Order 45. The program included three separate tests: 1) Roller Bearing Failure Mechanism; 2) Cone Bore Growth; and, 3) Raceway Defect Growth Rate. The Roller Bearing Failure Mechanisms test results demonstrated that bearings with grooved axle journal defects develop measurable temperature gradients across the cup surface, which can be detected using wayside Hot Bearing Detector systems configured to scan both the inboard and outboard bearing raceways to identify wheel sets with this defect. Audible acoustic emissions generated by bearings having this defect did not generate any Acoustic Bearing Detector (ABD) system alarms.

  • Record URL:
  • Supplemental Notes:
    • See also PB-93-226603. Sponsored by Federal Railroad Administration, Office of Research and Development.
  • Corporate Authors:

    Association of American Railroads

    50 F Street, NW
    Washington, DC  United States  20001-1564
  • Authors:
    • Florom, R L
  • Publication Date: 1994-8


  • English

Media Info

  • Pagination: 61 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00730625
  • Record Type: Publication
  • Report/Paper Numbers: DOT-FRA-ORD-94-21
  • Files: TRIS
  • Created Date: Feb 3 1997 12:00AM