Understanding where 'mk' fits in the hierarchy helps designers choose correctly.
If you are currently setting up a design pipeline, let me know:
This article provides a detailed overview of the ISO 2768-mK standard, explaining its components, application, and importance in machining and fabrication. What is ISO 2768-mK? general tolerance iso 2768-mk
Perpendicularity tolerances are determined by the longer of the two sides forming the right angle: Nominal Length Range (mm) Tolerance Class Up to 100 Over 100 to 300 Over 300 to 1000 Over 1000 to 3000 Symmetry and Run-out
For linear measurements like external/internal sizes, heights, and distances. Nominal Range (mm) Tolerance (± mm) 120 to 400 400 to 1000 Geometric Tolerances (Class K) Understanding where 'mk' fits in the hierarchy helps
If you are looking to apply this standard to a specific design, I can help analyze your drawings if you tell me the critical dimensions, or compare this standard to others like ISO 2768-fH (fine) or 2768-vL (very coarse). Just ask!
Angular tolerances in the "m" class are determined based on the length of the shorter leg of the angle in question: Length of Shorter Leg (mm) Tolerance Class (Medium) Up to 10 Over 10 to 50 Over 50 to 120 Over 120 to 400 Over 400 Part 2: Geometrical Tolerances (The "k" Class) Perpendicularity tolerances are determined by the longer of
Represents the "medium" tolerance class for linear and angular dimensions (from Part 1).
| Nominal Size Range (mm) | Permissible Deviation (mm) | | :--- | :--- | | 0.5 up to 3 | ±0.1 | | >3 up to 6 | ±0.1 | | >6 up to 30 | ±0.2 | | >30 up to 120 | ±0.3 | | >120 up to 400 | ±0.5 | | >400 up to 1000 | ±0.8 | | >1000 up to 2000 | ±1.2 |
While Part 1 handles size, Part 2 handles the of the part. The K class provides standard control over how straight, flat, or perpendicular a feature must be. Straightness and Flatness
