If your drawing title block says "ISO 2768-mK," but you explicitly label a critical slot as 20.00mm +0.02 / -0.00 , the manufacturer must prioritize the +0.02mm limit for that slot while applying the standard ISO ±0.2mm tolerance to the rest of the part. Conclusion
ISO 2768-mK is a versatile standard, but its use is not universal. It is most appropriate for parts where very tight, specific tolerances are not required for every feature. Its primary applications include:
Perpendicularity requires a datum feature. The tolerance depends on the length of the shorter leg forming the 90∘90 raised to the composed with power Nominal Length Range ( Tolerance Limit for Class "K" ( 3. Symmetry general tolerance iso 2768-mk
Answer key (concise) — for examiner use only
The standard defines specific permissible variations for linear, angular, and geometrical dimensions in machined parts without individual tolerance indications. This designation combines the "m" class (medium) for linear and angular dimensions with the "K" class for geometrical tolerances (form and position). It simplifies engineering drawings, reduces manufacturing costs, and ensures global consistency. Understanding ISO 2768-mK: The Global Engineering Standard If your drawing title block says "ISO 2768-mK,"
Class 'K' provides general geometric limits for the form and orientation of features. It is divided into three classes: H (fine), K (medium), and L (coarse). Straightness and Flatness:
The allowable deviations scale dynamically based on the size of the nominal dimension. Larger features are granted wider tolerances because they are inherently harder to measure and control during manufacturing. This designation combines the "m" class (medium) for
If you are currently working on a manufacturing blueprint, tell me:
Or, if you want to be explicit: