DIN EN ISO 129-1 2020-02 PDF

Full title and description

STB DIN EN ISO 129-1 2020-02 — Technical product documentation (TPD) — Presentation of dimensions and tolerances — Part 1: General principles. This entry refers to the national/EN adoption of ISO 129-1 (Edition 2, 2018) as published/adopted in early 2020; the standard sets out the general rules for indicating dimensions and associated tolerances on technical drawings and related documentation.

Abstract

ISO 129-1 establishes the general principles for presentation of dimensions and associated tolerances applicable to 2D technical drawings across disciplines and which can also be applied to 3D models. It introduces concepts such as property indicators, developed length, surface indicators, flag notes and textual instructions, and clarifies that it does not itself set tolerancing interpretation rules (see the ISO 14405 series for tolerancing principles).

General information

• Status: Published / Active (national EN adoption).
• Publication date: February 2020 (national/EN adoption designation: 2020-02).
• Publisher: Original publisher: ISO (International Organization for Standardization). National/EN adoption published under EN/DIN designation (catalogued in national standards collections).
• ICS / categories: 01.100.01 (Technical drawings in general); 01.110 (Technical product documentation).
• Edition / version: ISO 129-1, Edition 2 (2018) — adopted as EN/DIN national text in early 2020; Amendment A1 (2020) exists to clarify/update limited items.
• Number of pages: ISO core publication: 68 pages (Edition 2, 2018). National EN/DIN consolidated publications that include amendments are commonly published as combined documents (catalog entries commonly list ~80 pages for EN/DIN packaged editions).

Scope

This part defines the general rules for indicating dimensions and associated tolerances on technical product documentation. It applies to conventional 2D engineering drawings and may be applied in conjunction with 3D model-based documentation. The standard covers the form and placement of dimension lines and terminators, notation conventions, presentation of limits and fit indications where applicable, and the use of symbols and textual notes to make dimensioning unambiguous; it does not replace detailed tolerancing principles (see ISO 14405 and the GPS series for tolerancing interpretation).

Key topics and requirements

• General principles for presentation of dimensions and associated tolerances.
• Rules for dimension lines, extension lines, terminators and origin indication.
• Notation conventions for sizes, limits, and limit-style tolerances.
• Introduction and use of property indicators, developed length, between and surface indicators.
• Guidance on flag notes and textual instructions to ensure unambiguous dimensioning.
• Compatibility notes and cross-references to tolerancing standards (ISO 14405 series) and domain-specific parts of ISO 129.

Typical use and users

Engineers, technical drafters, CAD administrators, quality and manufacturing engineers, drawing standards committees, technical publishers and educators use ISO 129-1 as the reference for preparing clear, consistent technical product documentation. It is used across mechanical engineering, plant design, shipbuilding and steel structures where consistent dimensioning presentation is required.

Related standards

ISO 129-1 is part of the ISO 129 family (other parts cover mechanical engineering drawings, shipbuilding, steel structures and simplified dimensioning). It is closely related to the ISO 14405 series for dimensional tolerancing and to other drawing presentation standards (for example ISO 128 series). See the ISO 129 series and ISO 14405 for normative cross-references and domain-specific rules.

Keywords

technical product documentation, TPD, dimensioning, tolerances, drawing standards, ISO 129, dimension lines, property indicators, flag notes, CAD documentation

FAQ

Q: What is this standard?

A: ISO 129-1 defines the general principles for presenting dimensions and associated tolerances on technical product documentation (Part 1 of the ISO 129 series). The referenced national/EN entry (STB DIN EN ISO 129-1 2020-02) denotes the EN/DIN adoption published in early 2020.

Q: What does it cover?

A: It covers rules and conventions for placing and annotating dimensions on 2D drawings (and guidance for application to 3D), including line and terminator styles, notation of sizes and limits, use of property and surface indicators, and the use of notes to avoid ambiguity. It does not itself define tolerancing interpretation rules — those are found in the ISO 14405 series and related GPS documents.

Q: Who typically uses it?

A: Mechanical and civil engineers, CAD/drawing offices, manufacturing and quality teams, technical standardization committees and educators — any organization that creates or consumes engineering drawings and wants consistent, unambiguous dimensioning.

Q: Is it current or superseded?

A: The Edition 2 text (ISO 129-1:2018) is the current international edition; targeted amendments (Amd.1:2020 and subsequent EN/Amendment adoptions) have been published to clarify specific items. National EN/DIN adoptions published in 2020 reflect that international edition and its updates. Users should check their national standards body for the exact national publication status and any local amendments.

Q: Is it part of a series?

A: Yes — ISO 129 is a multi-part standard. Part 1 covers general principles; other parts address dimensioning for mechanical engineering drawings, shipbuilding, steel structures and simplified dimensioning, among others. Consult the ISO 129 family for part-specific rules.

Q: What are the key keywords?

A: dimensioning, tolerances, technical drawing, TPD, ISO 129, presentation of dimensions, property indicators, flag notes, CAD standards