Iso 2768-mh Tolerance Chart Jun 2026

The ISO 2768-MH tolerance chart is a valuable resource for engineers and manufacturers, providing a set of general tolerances for linear and angular dimensions. By understanding and applying the tolerances outlined in this chart, designers and manufacturers can ensure that their parts and components fit together seamlessly, while also minimizing costs and maximizing efficiency. Whether you're working in aerospace, automotive, or medical devices, the ISO 2768-MH tolerance chart is an essential tool to have in your toolkit.

If a part slightly violates an ISO 2768-mh tolerance but its functional utility is completely unimpaired, the component should not be automatically rejected unless the customer explicitly states so in their contractual documentation.

| Nominal dimension (°) | Tolerance (°) | | --- | --- | | 1-10 | ±0.5 | | 10-50 | ±1 | | 50-200 | ±2 |

3 — 6: ±0.1

The standard defines general tolerances for parts manufactured by metal removal (machining). The designation " mH " indicates two specific tolerance classes: " m " for linear and angular dimensions (Part 1) and " H " for geometrical features like straightness and flatness (Part 2). These standards are used to simplify engineering drawings by providing "standard" values for any dimension not specifically toleranced. Part 1: Linear & Angular Dimensions (Class "m" - Medium)

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Understanding the ISO 2768-mh Tolerance Chart: A Comprehensive Guide

ISO 2768 is an international standard that defines general tolerances for linear and angular dimensions. The standard provides a set of tolerances that can be applied to various features, such as lengths, widths, heights, and angles. The goal of ISO 2768 is to ensure that parts and components can be manufactured and assembled with a reasonable degree of accuracy, while also allowing for some degree of variation.

The standard removes the need to label every single dimension with a specific tolerance range. This keeps engineering drawings clean, readable, and easy to interpret on the workshop floor. Structural Breakdown of ISO 2768 The standard is split into two distinct parts:

The following table provides an example of the ISO 2768-MH tolerance chart for linear dimensions:

These tolerances apply specifically to broken edges, rounded corners, and chamfers. Nominal Size Range (mm) Permissible Deviation (Class m) Over 3 to 6 Over 6 to 30 3. Angular Dimensions (ISO 2768-1, Class m)

The standard must be noted near the title block as ISO 2768-mH to be legally binding for a project.

What you are using (CNC machining, sheet metal, 3D printing?) The material of your part (aluminum, steel, plastics?)

To get the most out of the ISO 2768-MH tolerance chart, follow these best practices:

: Tolerance class for geometrical tolerances (straightness, flatness, etc.). 1. Linear Dimensions (ISO 2768-m)