LABORATORY STUDIES OF RAILWAY EQUIPMENT 5 1/2 TIMES 10-IN. JOURNAL BEARING ASSEMBLIES ROLLER VS SOLID TYPE BEARINGS

The exploratory data made available through the limited tests completed to date, indicate, that with both types of bearings lubricated with car oil: (1) Lower starting (Static) friction or resistance for the roller over the solid type bearings under all conditions. (2) No advantage in running (dynamic) friction or resistance for the roller type bearing over the solid type bearing under fairly stabilized conditions. (3) The roller type bearing is capable of metal to metal operation at starting and relatively low speeds whereas the solid type bearing requires more power and is more susceptible to failure under these conditions. (4) The principle problem relating to the improvement of the solid type railway equipment journal bearing appears to be a matter of providing for a greater margin to take care of boundary lubrication during the relatively rapid changing oil film conditions attending abrupted speed reductions.

• Supplemental Notes:
  • Only conclusions page present.
• Corporate Authors:

  Association of American Railroads

  50 F Street, NW
  Washington, DC  United States  20001-1564
• Publication Date: 1949-8-31

Media Info

• Pagination: 1 p.

Subject/Index Terms

• TRT Terms: Bearings; Technology
• Geographic Terms: United States
• Subject Areas: Railroads;

Filing Info

• Accession Number: 00040245
• Record Type: Publication
• Report/Paper Numbers: AAR MR-69
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM