La présente norme définit des classes de tolérances susceptibles d'être obtenues sur les cotes non tolérancées des plans, en relation avec les outillages utilisés. Elle est de nature à permettre des échanges d'informations entre clients et fondeurs en fonction des méthodes de moulage et des types d'outillage à mettre en oeuvre pour parvenir à la réalisation des pièces dans les conditions souhaitées.
ISO 8062-3:2007 specifies general dimensional and geometrical tolerances, as well as machining allowance grades, for castings as delivered to the purchaser in accordance with ISO 8062-2. It is applicable for the tolerancing of dimensions and geometry, and required machining allowance of castings in all cast metals and their alloys produced by various casting manufacturing processes. ISO 8062-3:2007 applies to both general dimensional and general geometrical tolerances, unless otherwise specified. The dimensional tolerances covered by ISO 8062-3:2007 are tolerances for linear dimensions. The geometrical tolerances covered by ISO 8062-3:2007 are: tolerances for straightness, flatness, roundness, parallelism, perpendicularity, symmetry, and coaxiality. ISO 8062-3:2007 can be used for the selection of tolerance values for individual indications.
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