BS ISO 13988:2021 pdf download – Passenger car and light truck vehicle wheels — Clip and adhesive balance weight and rim flange nomenclature, test procedures and performance requirements This document specifies procedures and minimum performance requirements for testing without tyres the retention of balance weights for use on wheels for passenger vehicles. It also specifies general features for configurations of clip balance weights, rim flanges for light alloy and steel wheels intended for use on passenger cars and adhesive balance weights. Alternative materials and geometries can be considered in the future. 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 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking ISO 4000-1, Passenger car tyres and rims — Part 1: Tyres (metric series) ISO 4000-2, Passenger car tyres and rims — Part 2: Rims ISO 4223-1, Definitions of some terms used in the tyre industry — Part 1: Pneumatic tyres 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 3911, ISO 4000-1, ISO 4000-2, ISO 4223-1 and the following apply. 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/ 3.1 clip balance weight assembly assembly of the weight (3.1.1) and the clip (3.1.3), which is intended for mounting on the rim flange (3.3) to balance the tyre/wheel assembly about its axis of rotation and thus minimize vibrations due to the rotation of the tyre/wheel assembly Note 1 to entry: Figure 1 gives the terminology and nomenclature of balance weight assembly. 3.1.1 weight material of a specified mass with contours to conform to the surface of the rim flange (3.3) Note 1 to entry: The material is recommended to be free of lead. 3.1.2 clip specially formed metal affixed to the weight (3.1.1) to mount the balance weight on the rim flange (3.3) 3.1.3 spur optional part of a clip 3.1.3) that protrudes from its surface interfacing with the rim flange 3.3) 3.1.4 balance weight coating non-corrosive material coating to avoid corrosion EXAMPLE Polyester, nylon. 3.1.5 balance weight key dimensions...
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