Iso 2768 General Tolerances Pdf |link| Guide

What is ISO 2768?

ISO 2768 (full title: ISO 2768: General Tolerances) is an international standard that specifies general tolerances for linear and angular dimensions without individual tolerance indications on technical drawings.

By using ISO 2768, designers and manufacturers can specify general tolerances for their parts and assemblies, ensuring that they are interchangeable and functional.

: It saves massive amounts of design time. Instead of tolerancing 100 individual dimensions, you simply note "ISO 2768-m" in the title block to cover non-critical features. Cost Reduction Iso 2768 General Tolerances Pdf

Using the ISO 2768 general tolerances PDF (Table 1):

Simplified Drawings: It reduces "clutter" on blueprints, making them easier to read and less prone to interpretation errors. What is ISO 2768

FAQ 3: Is there a 2024 update to ISO 2768?

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 ISO has not superseded these standards.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".

The standard provides a set of general tolerance zones, which are used to specify the acceptable limits of variation for these geometric characteristics. ISO 2768-1: General tolerances — Part 1: Tolerances

13. References (recommended reading)

• ISO 2768-1: General tolerances — Part 1: Tolerances for linear and angular dimensions (check edition year)
• ISO 2768-2: General tolerances — Part 2: Geometrical tolerances
• ISO 1101: Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out
• ISO 286: ISO system of limits and fits
• Practical engineering texts on GD&T and drawing standards

Indicating the Standard on a Drawing

To apply these tolerances, a note must be placed in the title block or near the drawing title. Since the classes for Part 1 and Part 2 are different letters, they must be indicated clearly.