AGR-INFRASTRUCTURE-Railroads;AGR-INFRASTRUCTURE-INFRASTRUCTURE;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-SAFETY AND SECURITY-Vehicle Design;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;NTL-SAFETY AND SECURITY-Rail Safety;
Abstract:
AAR roller bearing requirements and interchange rules are presented and reviewed; also included and reviewed are rules covering adapters and grease for freight car bearings. Bearing fatigue theory, methods of fatigue life calculations, and characteristic fatigue damage of sub-assembly components are reviewed. The results of a limited survey of bearing manufacturers, AAR records, and a railroad bearing repair shop to determine failure modes and identify critical sub-assembly components are presented, including a method for determining bearing assembly life from the lives of the components. The results of the study to date indicate that two major causes of bearing failures are worn adapters and loss of lubricant.
Bearing defect data from 8,000 railroad roller bearings are analyzed to determine their defect modes and defect rate distributions. Cone bore growth, ...
John A. Volpe National Transportation Systems Center (U.S.)
1983-01-31
Abstract:
This investigation of the tubular-axle/roller-bearing failures experienced with M-2 multiple-unit cars of New York's Metropolitan Transportation Autho...
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United States Department of Transportation
[PDF-1.86 MB]
