ISO 5743:2021 pdf download – Pliers and nippers — General technical requirements.
1 Scope This document specifies the general technical requirements to be met by pliers and nippers. It does not specify insulating or antistatic characteristics of handle coatings. Plastic coatings or plastic sleeves are intended for gripping comfort only. This document is only applicable to pliers for which ISO standards exist. 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 5742, Pliers and nippers — Nomenclature ISO 5744, Pliers and nippers — Methods of test 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminology 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 Handles Handles of pliers shall be shaped to afford a comfortable grip and shall prevent accidental bruising or clamping. To prevent bruising of skin, clear-cut edges should be avoided, e.g. by designing the edges of the gripping zone with a radius, bevel or chamfer > 2 mm (see Figure 1) or similar solutions with a distance between the handles smaller than 10 mm.
5.2 Jaws For all pliers the jaws shall meet at the point. Pliers and nippers for which other specifications are laid down in the dimensional standards are excluded. Cutting edge of cutting pliers shall have a minimum hardness of 55 HRC. The hardness of the gripping surfaces for all pliers shall be a minimum of 42 HRC. The hardness shall be measured in accordance with ISO 5744. NOTE Rockwell C hardness (HRC) is defined in ISO 6508-1. 6 Designation 6.1 Nippers The principal information for the designation of nippers shall be given in the following order and in accordance with ISO 5742: a) designation and number of nomenclature; b) ISO standard concerned; c) dimensions; d) direction and position of cutting edges; e) f) type and shape of cutting edges; type of joint; g) shape of handles in the longitudinal direction; h) field of application (only if required for better understanding). 6.2 Gripping and dual-purpose pliers The principal information for the designation of gripping and dual-purpose pliers shall be given in the following order and in accordance with ISO 5742: a) designation and number of nomenclature; b) ISO standard concerned; c) dimensions; d) shape of nose (end view at the point); e) f) shape of nose (in the longitudinal direction); shape of back of the nose; g) whether with or without serrations; h) whether with or without grooves; i) j) type of joint; shape of handles in the longitudinal direction; k) field of application; for dual-purpose pliers, specify the test wire (only if required for better understanding).
ISO 5743:2021 pdf download – Pliers and nippers — General technical requirements
