BS EN ISO 286-1-2010 (2013) PDF

Full title and description

STB BS EN ISO 286-1:2010 (2013) — Geometrical product specifications (GPS) — ISO code system for tolerances on linear sizes — Part 1: Basis of tolerances, deviations and fits. This entry refers to the ISO 286-1:2010 international standard and its technical corrigendum published in 2013, as adopted/issued in the BS EN (European/British) context in 2013.

Abstract

ISO 286-1:2010 establishes the ISO code system used to specify tolerances on linear sizes for features such as cylinders and pairs of parallel opposite surfaces. It defines basic terms (nominal size, limits of size, deviations, tolerance interval), the ISO tolerance-class notation (fundamental deviation letter + standard tolerance grade, e.g. h9, IT7), and the principles of basic-hole and basic-shaft systems used to select fits between mating parts. A technical corrigendum (2013) corrects and clarifies small items in the 2010 text.

General information

• Status: Published / Active (ISO 286-1:2010 with Technical Corrigendum 2013; adopted as BS EN ISO 286-1:2010 in 2013).
• Publication date: ISO edition published April 2010; Technical Corrigendum published August 2013; BS EN adoption published 31 August 2013.
• Publisher: International Organization for Standardization (ISO); issued in the EN/BS catalogue as BS EN ISO 286-1:2010 by national standards bodies.
• ICS / categories: 17.040.10 — Limits and fits (dimensional and geometrical product specifications).
• Edition / version: Edition 2 (ISO 286-1:2010) with Technical Corrigendum 1 (ISO 286-1:2010/Cor 1:2013).
• Number of pages: ISO original: 38 pages; Corrigendum: 4 pages; BS/EN publication listing typically shows 46 pages (publisher layout can differ).

Scope

This part of ISO 286 establishes the ISO code system for tolerances applicable to linear-size features of two types: (a) cylinders (holes/shafts) and (b) two parallel opposite surfaces. It sets out the terminology, principles for expressing limit deviations and tolerance zones, selection rules for standard tolerance grades (IT grades), and explains the basic-hole and basic-shaft concepts used to derive fits without location/orientation constraints. The scope includes the coding rules and tables needed to select tolerance classes for general engineering practice.

Key topics and requirements

• Definitions: nominal size, actual size, upper/lower limits of size, fundamental deviation, tolerance and tolerance interval.
• ISO code notation: composition of a tolerance designation (fundamental deviation letter + standard tolerance grade, e.g. H7, h6, IT7).
• Standard tolerance grades (IT classes) and rules for selecting appropriate tolerance grades for sizes and functions.
• Principles of basic-hole and basic-shaft systems and determination of clearances, interferences and transition fits.
• Tables and numerical data for limit deviations and tolerance values across nominal-size ranges (as specified in the standard’s tables).
• Technical corrigendum items correcting/clarifying text and tables from the 2010 edition.

Typical use and users

Used by design engineers, manufacturing engineers, toolmakers, metrology specialists, quality engineers and standards committees to specify dimensional tolerances and fits in engineering drawings, part specifications and quality plans. It is a reference for selecting tolerance grades, interpreting fit notations on drawings, and establishing interchangeability requirements across mating parts. Industry sectors include mechanical engineering, automotive, aerospace, machine tools, and precision manufacturing.

Related standards

ISO 286 is a multi-part publication; Part 2 (ISO 286-2) provides tables of standard tolerance values for holes and shafts. Other related GPS and limits-and-fits documents include standards from ISO/TC 213 on geometrical product specifications and national/adopted EN/BS variants that reproduce ISO 286 content with corrigenda. The 2013 corrigendum to ISO 286-1 is directly related.

Keywords

ISO 286-1, limits and fits, tolerance grades, IT grades, fundamental deviation, basic hole, basic shaft, limit deviations, tolerance interval, geometrical product specifications (GPS), BS EN ISO 286-1.

FAQ

Q: What is this standard?

A: It is ISO 286-1:2010 — Part 1 of the ISO code system for tolerances on linear sizes, describing the basis of tolerances, deviations and fits; issued with a Technical Corrigendum in 2013 and adopted in EN/BS form in 2013.

Q: What does it cover?

A: It covers terminology, coding rules for tolerance classes (fundamental deviation + IT grade), principles for placing tolerance zones relative to nominal size, and the basic-hole/basic-shaft approach to defining fits for cylinders and pairs of parallel surfaces. Tables for tolerance values are provided in the Part 2 companion document.

Q: Who typically uses it?

A: Design, manufacturing and quality professionals who specify and verify dimensional tolerances and fits — including mechanical designers, production engineers, metrologists, toolmakers and standards bodies.

Q: Is it current or superseded?

A: The edition in question is ISO 286-1:2010 (Edition 2) with Technical Corrigendum 1 published in 2013. The 2010 edition remains the valid edition (with corrigendum); the ISO catalogue shows confirmation activity and the corrigendum publication in 2013. Users should check their national standards body for the most recent adoption or any later revisions.

Q: Is it part of a series?

A: Yes — ISO 286 is a multi-part series. Part 1 (this document) covers the basis, Part 2 contains the numerical tables of standard tolerance values; both parts together provide the complete limits-and-fits system used internationally.

Q: What are the key keywords?

A: Limits and fits, tolerance classes, IT grades, fundamental deviation, basic hole, basic shaft, linear size, geometrical product specifications (GPS), ISO 286.