EN ISO 10579:2013 PDF

Overview

EN ISO 10579:2013 (identical to ISO 10579:2010 including Cor 1:2011) is a Geometrical Product Specification (GPS) standard that gives rules for dimensioning and tolerancing non-rigid parts. It addresses parts that deform in the free state (under their own weight or residual stresses) but are intended to be verified or assembled in a restrained condition. The standard explains how to indicate restraint, free‑state tolerances and the conditions (orientation, gravity, support) needed to interpret drawing requirements correctly.

Key Topics

• Scope and definitions
  • Defines a non-rigid part (deforms beyond drawing tolerances in the free state) and free state (subject only to gravity).
• Basic principles
  • Distortion in the free state must not prevent bringing the part within specified tolerances using reasonable assembly/inspection forces (those expected in normal assembly).
  • Where necessary, tolerancing applies in a restrained condition rather than the free state.
• Drawing indications
  • Use the identification “ISO 10579‑NR” on drawings to indicate non‑rigid parts.
  • Specify restraint conditions in a note (e.g., datum surfaces mounted, mating sizes, fixtures, orientation and gravity direction).
  • Use modifying symbols (per ISO 1101) to show tolerances that apply in the free state.
• Informative guidance
  • Annex A provides sample drawing annotations and interpretations (examples include specifying how surfaces are clamped or bolted and the mating condition used for verification).
• GPS matrix position
  • EN ISO 10579 is a global GPS standard influencing form, orientation, location and run‑out chains (see ISO/TR 14638 for the GPS matrix).

Applications

• Design and drafting of thin, flexible or stressed parts (thin metal sheets, plastics, rubber components) where manufacturing release or handling changes shape.
• Production engineering and tooling: defining how parts are fixtured, clamped or restrained for inspection and assembly.
• Quality control and metrology: establishing repeatable verification procedures that reflect assembled function rather than the uncontrolled free state.
• Industries: automotive, aerospace, consumer products, medical devices and any sector using flexible components or precision sheet/formed parts.

Who should use this standard

• Mechanical design engineers, CAD/drawing specialists, manufacturing engineers, inspection and quality engineers, and standards/technical committees responsible for tolerancing practices.

Related standards

• ISO 1101 – Geometrical tolerancing (referenced normative standard for symbols and tolerance frames).
• ISO/TR 14638 – GPS masterplan and matrix context.
• Other GPS standards on positional tolerancing, datums and material requirements (see the ISO 10579 bibliography).

Keywords: EN ISO 10579:2013, ISO 10579, non‑rigid parts, GPS, dimensioning and tolerancing, geometrical product specifications, drawing indications, inspection restraint.