If a specific dimension has a directly applied tolerance (e.g., 10±0.05 ), the general tolerance ( ±0.2 for 10 mm) is for that feature. The individual tolerance takes precedence.
Applying this standard is straightforward. It's typically indicated in the drawing's title block with a clear note, such as "". This note informs the manufacturer that all dimensions without explicit tolerances must conform to the rules of that standard.
It keeps drawings clean. Only critical dimensions (like a bearing fit or a sealing surface) need specific ± tolerances. general tolerance iso 2768-mk
The uppercase letter represents the tolerance class for general geometrical features, such as straightness, flatness, perpendicularity, and symmetry. ISO 2768-2 defines three classes: H – Tight K – Medium L – Loose
These apply to features (flatness, straightness, perpendicularity, symmetry, runout) . If a specific dimension has a directly applied tolerance (e
Limits are based on the length of the longest surface line or diameter. Perpendicularity: Controls the 90-degree relationship between surfaces.
While ISO 2768-mK is an excellent baseline, it is not a one-size-fits-all solution. Designers must manually override the general tolerance in specific scenarios: It's typically indicated in the drawing's title block
The lowercase letter represents the tolerance class for linear dimensions (lengths, radii, diameters) and angular dimensions. ISO 2768-1 defines four accuracy classes: f – Fine m – Medium c – Coarse v – Very Coarse