2. Interpretation of part dimensional limits
As no real surface has a perfect shape, the numerical value defining a limit remains an abstraction until it is materialized by a measuring instrument. The latter, through its structure and methods of use, gives concrete meaning to this value.
On the other hand, the nature of the criteria verified and the methods used to verify them must be determined with a view to ensuring the necessary and sufficient conditions for the surface to be fit for purpose.
2.1 Principle of independence
When no special conditions are required, each element of a part must independently satisfy the specified dimensional and geometric tolerances. In other words, the dimensional limits of a component are checked regardless of its geometric deviations....
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Interpretation of part dimensional limits
Taylor's principle
Standardization
French standards
Association Française de Normalisation (AFNOR): http://www.afnor.fr
- Système ISO de tolérances et d'ajustements - Partie 1 : base des tolérances, écarts et ajustements (identique ISO 286-1). - NF EN 20286-1 - 12.93
- Système ISO de tolérances et d'ajustements - Partie 2 : tables des degrés de tolérance normalisés et des écarts limites des alésages et des arbres (identique ISO 286-2)....
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