Iso 2768 General Tolerances Pdf Jun 2026

To apply these general tolerances, the information must be indicated in or near the title block of the technical drawing, for example, "ISO 2768-m" or "ISO 2768-mK". This ensures that all dimensions without individual tolerance indications are understood to be governed by the specified tolerance class.

The ISO 2768 standard is divided into two distinct parts. A complete drawing callout usually references both (e.g., ISO 2768-mK ). Part 1: Linear and Angular Dimensions (ISO 2768-1)

Values are in millimeters (mm) based on the length of the larger surface. Tolerance Class Up to 10mm Over 10 to 30mm Over 30 to 100mm Over 100 to 300mm Over 300 to 1000mm K L How to Read "ISO 2768-mK" on a Drawing

: Reduces visual noise on engineering prints. Iso 2768 General Tolerances Pdf

| Range of Nominal Length of Shorter Side (mm) | Grade H | Grade K | Grade L | | :--- | :--- | :--- | :--- | | up to 100 | 0.2 | 0.4 | 0.6 | | >100 up to 300 | 0.3 | 0.6 | 1.0 | | >300 up to 1000 | 0.4 | 0.8 | 1.5 | | >1000 up to 3000 | 0.5 | 1.0 | 2.0 |

In the world of mechanical engineering and manufacturing, precision is paramount. However, specifying tight tolerances on every single dimension of a part is impractical, time-consuming, and expensive. This is where comes into play.

What specific you are using (CNC machining, injection molding, sheet metal?) The criticality of your part's application To apply these general tolerances, the information must

This is the core of your search. Many websites offer "free" PDFs, but they are often outdated, incomplete, or violate copyright. Here is the legitimate path:

You can purchase official copies from reputable sources such as:

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ISO 2768 is designed to define the "customary workshop accuracy." By citing "ISO 2768" in a drawing title block, you automatically apply a set of allowable deviations to all dimensions that don't have a specific tolerance listed. Key Benefits Removes "clutter" from blueprints.

: Specifies geometrical tolerances, including straightness, flatness, perpendicularity, and symmetry. waterson.com Tolerance Classes

As of 2025, the 1989 versions are still current. ISO has not superseded these standards. Always check the ISO website for the latest "Status: Current".

Other common designations include:

The most common standard for general mechanical engineering.