((top)) — Norme Iso 2768 Mk
However, ISO 2768-mK is not a universal panacea. It is explicitly not intended for certain features. The standard excludes tolerances for chamfer angularity, fillet radii, or dimensions that are inherently dependent on other features (e.g., angular relationships from a datum). Furthermore, “mK” is inadequate for high-precision industries like aerospace or medical devices, where finer classes (like ISO 2768-fH) or fully defined individual tolerances are mandatory.
La classe est la plus couramment utilisée dans l'industrie pour les pièces mécaniques standard. Elle définit l'écart admissible en millimètres (mm) en fonction de la taille nominale de la pièce. Plage de dimension (mm) Tolérance Classe "m" (± mm) Plus de 3 à 6 Plus de 6 à 30 Plus de 30 à 120 Plus de 120 à 400 Plus de 400 à 1000 Données issues des tableaux de tolérances générales . 2. ISO 2768-2 : Tolérances Géométriques (Classe "K") The Basics of General Tolerance Standard – ISO 2768-mK norme iso 2768 mk
Armed with this knowledge, Jérôme rushed to the production floor to communicate the new requirements to the manufacturing team. He gathered the team around him and explained that, according to Norme ISO 2768 MK, the tolerance for the part's linear dimensions would be +/- 0.1 mm, and the geometric tolerances would be more stringent than usual. However, ISO 2768-mK is not a universal panacea
For angles, the tolerance depends on the length of the shorter leg of the angle. For Class "m": Plage de dimension (mm) Tolérance Classe "m" (±
As the day progressed, Jérôme noticed that the team's work was meeting the new standards. The parts were being machined with precision, and the quality control checks were confirming that the tolerances were within the specified limits.