BS ISO 5287:2021 pdf download – Belt drives — V-belts for the automotive industry — Fatigue test

BS ISO 5287:2021 pdf download – Belt drives — V-belts for the automotive industry — Fatigue test This document specifies a fatigue test for the quality control of V-belts (sections AV 10, AV 10X, AV 13,AV 13X, AV 17 and AV 17X) intended for driving the auxiliaries of internal combustion engines used for automotive purposes. NOTE The dimensional characteristics of these belts and of the corresponding pulleys are the subject of ISO 2790. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 683-1, Heat-treatable steels, alloy steels and free-cutting steels — Part 1: Non-alloy steels for quenching and tempering ISO 2790, Belt drives — V-belts for the automotive industry and corresponding pulleys — Dimensions ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at https://www.electropedia.org/ 4 Symbols For the purpose of this document, the following symbols apply. Symbol Definition Unit d e1 effective diameter of both the driving and driven pulleys mm d e2 effective diameter of the idler pulley mm E centre distance between the driving and driven pulleys mm F belt tensioning force N g additional slip % 6.1.4 Device, through which tension can be applied to the belt: a) in the case of the three-pulley test machine layout, an idler pulley (see Figure 1); b) in the case of the two-pulley test machine layout, a movable pulley (see Figure 2). 6.1.5 Means of determining belt slip, to an accuracy of ± 1 %. The layout of the pulleys and the direction of rotation shall be as shown in Figures 1 and 2. In order to accommodate different lengths of belt, the position of the driving and driven elements, and the position of the idler pulley and its support bracket in the case of the three-pulley test machine, shall be adjustable so that the test...