This report describes a series of field measurements of the operating temperatures of railcar roller bearings. These measurements included operating temperatures at train speeds of 30 mph and 50 mph with loaded and unloaded cars. Also included are measurements taken when all the lubrication was removed from the bearing and the bearing was allowed to fail due to overheating. These measurements were taken in support of the Department of Transportation System for Train Accident Reduction (DOT-STAR) Program. DOT-STAR was designed by the Naval Surface Weapons Center to detect overheated bearings and minor derailments and stop the train. Various overheated bearing (thermal) sensor locations were evaluated. A 300 deg F bearing surface temperature was established as the temperature at which to stop the train. A computer model was developed to predict railroad car roller bearing temperatures. This model was adjusted to agree with measured data. The model was used to predict bearing temperature at a train speed of 80 mph in an ambient temperature of 126 deg F. This prediction was discussed with roller bearing experts and was thought to be too high. Adjustments were made to the computer model.

  • Corporate Authors:

    Naval Surface Weapons Center

    White Oak Laboratory
    Silver Spring, MD  United States  20910

    Federal Railroad Administration

    Office of Rail Safety Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Peacock, T V
    • Snider Jr, H H
  • Publication Date: 1980-4

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 61 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00319056
  • Record Type: Publication
  • Report/Paper Numbers: FRA/ORD-80/43 Prog Rpt., TN-78-28
  • Files: TRIS, USDOT
  • Created Date: Sep 16 1980 12:00AM