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ISO 8015 mandates that:
: All specifications and measurements are based on a standard reference temperature of 20°C . Common ISO 8015 Tolerance Charts iso 8015 tolerance chart
: Every dimensional or geometric tolerance must be met on its own. For example, a diameter tolerance only controls the local size (two-point measurement) and does not limit how much the part can deviate from a perfect cylinder. ISO 8015 mandates that: : All specifications and
If a pin has a Maximum Material Size of 10.0mm and a Straightness tolerance of 0.1mm: If a pin has a Maximum Material Size of 10
The is a foundational reference in mechanical engineering that establishes the Independency Principle . Unlike other standards where size might automatically control form, ISO 8015 dictates that dimensional and geometrical tolerances (like straightness or flatness) are completely independent unless a specific relationship is noted on the drawing. Key Concepts of ISO 8015
Since ISO 8015 makes Independence the default, the standard provides a method to invoke the stricter "Envelope Principle" when necessary.
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