General Tolerance Iso 2768-mk Guide

) directly next to that specific dimension on the drawing. Specific callouts always override general standards. Best Practices for Designers and Machinists

: 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.

Engineers save time because they only need to calculate and write out tight tolerances for critical, high-precision features. general tolerance iso 2768-mk

| Geometrical Character | Nominal Size Range (mm) | Tolerance (mm) | | :--- | :--- | :--- | | | Up to 10 | 0.05 | | | Over 10 up to 30 | 0.1 | | | Over 30 up to 100 | 0.2 | | | Over 100 up to 300 | 0.4 | | | Over 300 up to 1000 | 0.6 | | Perpendicularity | Up to 100 | 0.4 | | | Over 100 up to 300 | 0.6 | | | Over 300 up to 1000 | 0.8 | | Symmetry | Up to 100 | 0.6 | | | Over 100 up to 300 | 0.8 | | | Over 300 up to 1000 | 1.0 | | Run-out (Circular) | Any length | 0.3 |

If you are a machinist or quality inspector, seeing "ISO 2768-mk" on a drawing tells you: ) directly next to that specific dimension on the drawing

Note: Tolerance applies to the of the angle.

Functionality. 'cL' is too loose for sliding fits, rotating shafts, or aligned mounting holes. 'mk' ensures basic interchangeability. Functionality

When a drawing includes the note "ISO 2768-mK":

: For applications requiring high precision, such as certain aerospace or medical device components, tighter and more specific tolerances may be necessary.