General ISO Geometrical Tolerances Per. ISO 2768 The following are general geometrical tolerances per. ISO 2768 for the following: • Linear Dimensions • External Radius and Chamfer Heights • Straightness and Flatness • Perpendicularity • Symmetry • Runout Related Mechanical Tolerance Design Data • • • • Variations on dimensions without tolerance values are according to ' ISO 2768'.
All tolerance limits are given in mm. ISO 2768 and derivative geometrical tolerance standards are intendedto simplify drawing specifications for mechanical tolerances. ISO 2768 is mainly for parts that are manufactured by way of machining or removal of materials.
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