General Tolerance Iso 2768-mk Jun 2026

In your title block or general notes, write exactly this:

Linear dimensions include external sizes, internal sizes, steps, diameters, and distances. Nominal Size Range (mm) Permissible Deviation (mm) for Class Over 3 to 6 Over 6 to 30 Over 30 to 120 Over 120 to 400 Over 400 to 1000 Over 1000 to 2000 Over 2000 to 4000 External Radii and Chamfer Heights

For external radii and chamfer heights, the tolerances for class "m" are tighter to prevent sharp edges or excessive rounding: Nominal Dimension Range (mm) Permissible Deviation (mm) over 3 to 6 Permissible Deviations for Angular Dimensions general tolerance iso 2768-mk

1. Part 1: Linear and Angular Dimensions (The lowercase "m")

To use the standard effectively, you need to know how the nominal size of a feature dictates its allowable deviation. Here is a look at the "m" and "K" standards: Linear Dimensions (ISO 2768-m) In your title block or general notes, write

: Ranges from 0.05 mm for small parts to 0.6 mm for parts over 1000 mm long. Perpendicularity

120 to 400 mm: ±1.2 mm

: This tolerance class defines the medium tolerance for linear dimensions. It offers a balanced approach, providing reasonable tolerances that are not too tight, which could be difficult and costly to achieve, nor too loose, which could compromise the functionality and interchangeability of parts.

What are you planning to use? (e.g., CNC milling, 3D printing, sheet metal stamping) What materials are you working with? Here is a look at the "m" and

These apply to features (flatness, straightness, perpendicularity, symmetry, runout) .

1000 to 2000 mm: ±3.0 mm