The ISO 286 standard, also known as "ISO 286-1:2010 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits," provides a framework for tolerances on linear sizes.
Why invest time in finding the ISO 286 PDF? Because it directly affects your bottom line.
ISO 286 is not just a set of tables — it is a logical, internationally agreed language for controlling size variation in manufacturing. The official PDF is an essential reference for any engineer, machinist, or quality professional. While the full document is protected by copyright and must be purchased, its concepts are widely summarized in textbooks and training materials. Understanding ISO 286 is a fundamental step toward producing parts that assemble correctly, function reliably, and fit within global supply chains. iso 286 pdf
The current active version is ISO 286-1:2010 (Part 1). Part 2 provides tables of standard tolerance classes and hole/shaft deviations. Always check the ISO catalog to see if a newer amendment exists.
To understand what you will find in an ISO 286 PDF, you must understand three fundamental elements: The ISO 286 standard, also known as "ISO
| Nominal Size (mm) | H7 (Lower EI) | H7 (Upper ES) | | :--- | :--- | :--- | | Over 3 up to 6 | 0 | +12 | | Over 6 up to 10 | 0 | +15 | | Over 10 up to 18 | 0 | +18 | | Over 18 up to 30 | 0 | +21 | | Over 30 up to 50 | 0 | +25 | | Over 50 up to 80 | 0 | +30 |
Overall, the ISO 286 standard provides a comprehensive and systematic approach to specifying and verifying geometric tolerances for features of size. The standard is well-organized and easy to use, and provides guidance on the selection of tolerances, deviations, and fits for cylindrical features. The PDF version of the standard appears to be well-produced and easy to navigate. Lower numbers (IT01 to IT4): Used for precision
ISO 286, also known as "Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes," provides a system for specifying and controlling the dimensional tolerances of linear sizes, including diameters, lengths, widths, and heights. The standard defines a set of tolerance classes, which are used to specify the acceptable limits of variation in the size and form of a component.