National Research Council of Canada. NRC Centre for Surface Transportation Technology
International Heavy Haul Association Conference on Freight Car Trucks/Bogies, June 9-12 1996, Montreal
Wheel and rail inspections are carried out as part of the regular maintenance procedure
on North American railways. Visible defects which meet the Association of American
Railroads (AAR) criteria are grounds for removal of the wheel set for safety and
operational considerations. This report discusses phenomena relevant to the formation
of wheel defects, explaining the contributing influences of load, wheel and rail profiles,
pummeling, lubrication and material properties on defect formation. The procedures and
definitions used for railway wheel inspections are outlined and illustrated.
Proceedings: International Heavy Haul Association Conference on Freight Car Trucks/Bogies, Montreal June 1996.