General Tolerance Iso 2768-mk Here
| Range of Nominal Length (mm) | Straightness / Flatness (mm) | Perpendicularity (mm) | Symmetry (mm) | Runout (mm) | | --- | --- | --- | --- | --- | | 10 to 30 | 0.05 | 0.1 | 0.2 | 0.1 | | >30 to 100 | 0.1 | 0.2 | 0.3 | 0.2 | | >100 to 300 | 0.2 | 0.4 | 0.6 | 0.4 | | >300 to 1000 | 0.3 | 0.6 | 1.0 | 0.6 | | >1000 to 3000 | 0.4 | 0.8 | 1.5 | 0.8 |
Class 'm' is the standard "medium" tolerance level typically used in CNC machining and general engineering. It defines the allowable deviation based on the size of the dimension: Nominal Size Range (mm) Tolerance (± mm) for Class 'm' > 30 to 120 > 120 to 400 > 400 to 1000 Angular Dimensions: general tolerance iso 2768-mk
The notation must be unambiguous. Place the following in the title block or a general note: | Range of Nominal Length (mm) | Straightness
Understanding ISO 2768-mk: The Standard for General Tolerances general tolerance iso 2768-mk
120 to 400 mm: ±1.2 mm
