PROBLEMS CONNECTED WITH THE DESIGN, ASSEMBLY AND MAINTENANCE OF TRAILER STOCK WHEELSETS. CONTRIBUTION TO THE DETERMINATION OF THE OPTIMUM CONDITIONS FOR FITTING THE WHEELS ONTO THE AXLE

This report relates to item 3 of the working programme; it concerns tests on the fitting of wheel-centres onto the axles of coaches and wagons and on their removal. It specifies the purpose of the tests and indicates the procedures adopted. Details are also given about the measurements taken and the results obtained concerning: the pressing-on load and the back-pressure load, and the relationship between these loads, the grip, and the surface conditions, as well as about the distortion of bosses and bores, as analysed by the straingauge measurements indicated in Appendix A4. The results of these first tests show that the UIC Leaflet No. 813-0, which specifies a pressing-on load (allowing for lubricating) and a back-pressure test (not compulsory), is inadequate for determining the quality of the wheel/axle assembly and the means of obtaining this quality. It would seem advisable to consider grip and possibly surface conditions, and to give particulars about a new lubricant. Although these first tests do not enable any definite values to be recommended for these parameters, they do show that the bores are distorted as a result of press- fitting, whereas with shrink-fitting there was no distortion with the wheels tested. Since the shape and dimensions of the wheel bosses varied with the two methods, further tests will have to be made to ascertain the causes of the bore distortions, using surface conditions and grip values based on the results of the first tests.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1966-3

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Railroad cars; Railroad wheel shops; Stresses; Vehicle design; Vehicle maintenance; Wheels; Wheelsets (Railroads)
• Identifier Terms: Statens Jarnvagar
• Old TRIS Terms: Question b79; Wheel axle interference; Wheel design; Wheel maintenance; Wheel mounting techniques; Wheel presses; Wheel shops; Wheel stresses
• Subject Areas: Design; Maintenance and Preservation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00052912
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: B79/RP 1/E Intrm Rpt.
• Files: TRIS
• Created Date: Nov 17 1976 12:00AM