This document establishes the general principles for presentation of dimensions and associated tolerances that apply to 2D technical drawings in all disciplines and trades but which can also be applied to 3D applications. This document does not cover the application of dimensional tolerances and their meaning. See ISO 14405-1 for tolerancing principles. This document can only be used to describe the nominal model of a drawing, not the non-ideal surface model (skin model) used for tolerancing purposes (for more information on tolerancing specifications, see the list of GPS standards listed as normative reference or as bibliography) Considering the ISO 14405 series, the presentation of tolerance indication is unambiguous when it is applied to a dimension which is a size and ambiguous when the dimension is not a size. All rules presented in this document are available for any type of drawing (see ISO 29845). In addition, this document introduces the concept of property indicators, developed length, between, surface indicators, flag notes and textual instructions.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Presentation of dimensions
4.1 Presentation rules
4.2 Positioning of dimensions
4.3 Units of dimensions
5 Elements of dimensioning — Usage
5.1 General
5.2 Property indicators
5.3 Dimension line
5.4 Terminators and origin presentation
5.5 Extension line
5.6 Leader line
5.7 Dimensional values
5.8 Alpha numerical characters and symbols representing dimensional values
5.9 Tabular dimensioning
5.10 Complementary indication
6 Presentation of dimensional tolerances
6.1 General
6.2 Limit deviations
6.3 Limit dimensioning
7 Presentation of special dimensions
7.1 Arrangement of graphical and letter symbols with dimensional values
7.2 Diameters
7.3 Radii
7.4 Spheres
7.5 Between
7.6 Arcs, chords and angles
7.7 Squares
7.8 Equally spaced and repeated features
7.9 Symmetrical workpieces and views
7.10 Presentation of levels
7.11 Dimensions of out-of-scale represented features
7.12 Auxiliary dimensions
7.13 Theoretical exact dimensions
7.14 Dimensioning of curved features
7.15 Dimensioning of developed views
7.16 Dimensioning of thin parts
7.17 Dimensioning of restricted areas
8 Arrangements of dimensions
8.1 General
8.2 Chain dimensioning
8.3 Parallel dimensioning
8.4 Running dimensioning
8.5 Coordinate dimensioning
8.6 Combined dimensioning
9 Notes and special notations
9.1 Flag notes
9.2 Indication of textual instructions
Annex A Relations and dimensions of graphical symbols (normative)
Annex B Chamfers, countersinks, wedges, cones and screw threads (informative)
ISO 10209 Technical product documentation — Vocabulary — Terms relating to technical drawings, product definition and related documentation
ISO 128-20 Technical drawings — General principles of presentation — Part 20: Basic conventions for lines
ISO 128-22 Technical drawings — General principles of presentation — Part 22: Basic conventions and applications for leader lines and reference lines
ISO 10209 Technical product documentation — Vocabulary — Terms relating to technical drawings, product definition and related documentation
ISO 128-20 Technical drawings — General principles of presentation — Part 20: Basic conventions for lines
ISO 128-22 Technical drawings — General principles of presentation — Part 22: Basic conventions and applications for leader lines and reference lines
ISO 128-24:2014 Technical drawings — General principles of presentation — Part 24: Lines on mechanical engineering drawings
ISO 14405 (all parts) Geometrical product specifications (GPS) — Dimensional tolerancing
ISO 3098 (all parts) Technical product documentation — Lettering
ISO 81714-1 Design of graphical symbols for use in the technical documentation of products — Part 1: Basic rules