The German State Railway conducted the necessary tests on the bench and on the Berlin S-Bahn. The tests were based on the assumption that the wheel wear might be diminished if the shape of the composition brake blocks was altered from the usual rectangular shape taken over from cast-iron blocks. A number of different geometrical shapes of the friction surface of composition brake blocks were considered. The coefficient of friction under various conditions was similar with all block shapes tested. None of the block shapes tested produced any bad side effects. It was not possible to find any significant differences between the different block shapes when braking with one block per wheel or with two blocks per wheel; though tire wear for braking with one block per wheel was slightly lower than that for braking with two blocks per wheel. The tests have not revealed any compelling reason for diverging from the customary simple rectangular shape brake blocks.

  • 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: 1970-10

Media Info

  • Features: Appendices; Figures;
  • Pagination: 9 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00040406
  • Record Type: Publication
  • Report/Paper Numbers: B64/RP 8/E
  • Files: TRIS
  • Created Date: Jan 22 1976 12:00AM