General Tolerance Iso 2768-mk [verified] -

ISO 2768-mK is an international standard for general tolerances used to simplify technical drawings by providing default limits for dimensions and geometric features that do not have specific tolerance markers. 🛠️ What "mK" Means

ISO 2768-mk is the "Goldilocks" of manufacturing tolerances—not too tight, not too loose. It ensures that parts are functional and interchangeable without unnecessary manufacturing expenses. When you see it on a drawing, you’re looking at a standard of Medium Linear accuracy and Medium Geometrical control. general tolerance iso 2768-mk

Report: General Tolerances per ISO 2768-mK

Date: October 26, 2023 Subject: Interpretation and Application of General Tolerance Standard ISO 2768-mK ISO 2768-mK is an international standard for general

  • ISO 2768 was split into ISO 2768‑1 (general tolerances – linear and angular) and ISO 2768‑2 (geometrical tolerances) in later revisions; (short: standard was clarified and modularized).
  • Alternative: ASME Y14.5 (GD&T) — chosen for explicit geometric control and widespread use in North America.
  • f (fine)
  • m (medium) – Used in the requested designation.
  • c (coarse)
  • v (very coarse)

Explicit Overrides General: If you write "±0.05" next to a dimension, that specific value overrides the general ISO 2768-mK class for that feature. ISO 2768 was split into ISO 2768‑1 (general

| Code | Refers to | Tolerance Class | Typical Application | |------|-----------|----------------|---------------------| | m | ISO 2768-1 (Linear/Angular) | Medium | General machining (lathe, mill, drilling) | | k | ISO 2768-2 (Geometrical) | Fine | Tighter form & position control |

Decoding the Code: What does ‘mk’ stand for?

The notation ISO 2768-mk combines two different tolerance classes.

This class provides permissible deviations based on the nominal size of the dimension. Nominal Length Range (mm) Tolerance (± mm) 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 ISO 2768-1 Tolerance Chart ISO 2768-2: Geometrical Tolerances (Class K)