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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>THE ASSEMBLY OF WHEELSETS. PROBLEMS OF METHOD AND DESIGN</title>
      <link>https://trid.trb.org/View/146671</link>
      <description><![CDATA[Wheelsets were previously assembled by longitudinal pressing, but increasing use is now being made of transverse pressing and adhesive shrinking.  The author describes and compares the three methods, stating a preference for transverse pressing and more particularly shrinking.  He shows that the higher bending stresses in and near the wheel-seat offer interesting possibilities in respect of safety and lighter construction.]]></description>
      <pubDate>Sat, 29 Dec 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146671</guid>
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      <title>INCREASING THE LIFETIME OF FORCE-FIT JOINTS</title>
      <link>https://trid.trb.org/View/85246</link>
      <description><![CDATA[The application and characteristics of force-fit joints are described, as well as the operating conditions of this type of joint in wheel sets of rail vehicles.  The results of performance tests are used to illustrate the fretting effect.  The effect of protective coatings on the strength of force-fit joints and the quality of the bearing surfaces is discussed.  The criteria for the selection of such coatings are cited.]]></description>
      <pubDate>Wed, 25 Apr 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/85246</guid>
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      <title>EVALUATION OF MOLYBDENUM DISULFIDE (MOS//2) AS AN ADDITIVE FOR RAILROAD WHEEL MOUNTING COMPOUNDS -- INTERIM REPORT</title>
      <link>https://trid.trb.org/View/80957</link>
      <description><![CDATA[The Association of American Railroads specifies the use of a white lead compound to press-fit railroad car wheels onto axles.  It seeks assistance in the development of alternate lubricants because of recent restrictions on the use of toxic materials.  This interim report reviews testing of MoS sub 2 containing wheel mounting compounds in laboratory and field evaluations of wheel mounting and removal.  The testing indicates that several of the candidate materials containing MoS sub 2 demonstrate that nontoxic, unleaded lubricants can be made available with characteristics similar to current approved products.]]></description>
      <pubDate>Sat, 03 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/80957</guid>
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      <title>PRESS FITS FOR WHEELSETS UNDERLYING HIGHEST SERVICE LOADS</title>
      <link>https://trid.trb.org/View/76907</link>
      <description><![CDATA[Assurance of the integrity of the press fit of wheels, gears and brake discs in wheelset assembly is vital.  Stress analysis of such fits is possible; details of mounting all such elements are available.  The interference and coefficient of adhesion are important in all press fits. Extreme conditions such as brake shoe heating are the principal threat to successful force fits.  A conical wheelseat/hub assembled by hydraulics is practicable for locomotive driving axles.]]></description>
      <pubDate>Fri, 29 Dec 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/76907</guid>
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    <item>
      <title>BOND SHRINKING OF WHEEL SETS OFFERS MANY ADVANTAGES ON RAILWAYS NOW AND IN THE FUTURE</title>
      <link>https://trid.trb.org/View/53562</link>
      <description><![CDATA[The wheel set, as a supporting, driving and guiding element of railways, continues to be of immediate interest as a result of the research activities on the wheel/rail system and in spite of the development work on new technologies. Since 1855, the wheel centres have been forced on the oversize axle seat by hydraulic pressure.  This proven joining technique can be improved by metal bonding.  Bond shrinking results in a considerably higher intensity of the grip between the wheel centres and the axle and in a reduction of the axle oversize to one third of that required for pressing on the wheels by hydraulic pressure.  For six years, a number of carrying and driving wheel sets have been in service on combustion railcars and have covered distances up to 700,000 km. without any trouble.  For this reason, a large-scale test is being implemented.  The technique of bond shrinking will be further developed to permit the mounting of axle brake discs and wheels with brake blocks and the production of hollow shafts capable of withstanding cyclic bending stresses.]]></description>
      <pubDate>Thu, 04 Aug 1977 00:00:00 GMT</pubDate>
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      <title>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</title>
      <link>https://trid.trb.org/View/15136</link>
      <description><![CDATA[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.]]></description>
      <pubDate>Wed, 17 Nov 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/15136</guid>
    </item>
    <item>
      <title>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</title>
      <link>https://trid.trb.org/View/15137</link>
      <description><![CDATA[This report is a supplement to Interim Report No. 1 which deals with point III of the Programme of Work.  It describes the results of tests of pressing solid wheels on and off the axles of hauled stock.  This report explains the object of this second series of tests and describes how they were carried out; it also contains the measurements made and the results recorded, for: the loads for pressing-on and pressing-off, the relations between these loads, and the geometric errors of the components after pressing-off, as well as the conclusions concerning the deformation of the bosses and the bores obtained by strain-gauge measurements described in Appendix 2.  One of the aims of these tests was to find the causes of distortion of the bores observed during the previous tests and mentioned in RP 1.  These tests have also enabled it to be demonstrated that an assembly put together according to the recommendations of RP 1 for the surface condition, the pressing-on load and the lubrication is a good solid job.  Moreover, the performance of these tests has enabled one Administration to work out a method for obtaining, with normal machine tools, a surface condition which is within the two limits provisionally fixed.  This study was described in an article published in the January 1966 edition of the magazine "Glasers Annalen". In order to know how assemblies put together by the methods used in the tests will behave in service, some additional tests will be necessary.  It seems, that as a first step, some tests carried out in the laboratory on specimens, could make a useful contribution.  This is the action that the Committee proposes to take.]]></description>
      <pubDate>Wed, 17 Nov 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/15137</guid>
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