Iso 2768-mh Tolerance Chart Direct

ISO 2768-mH is a combination designation used in engineering drawings to specify general tolerances for parts without individual tolerance indications. It combines two distinct parts of the ISO 2768 standard: "m" (medium precision) for linear and angular dimensions, and "H" (high precision) for geometrical features. Understanding the "mH" Designation

  1. ISO 2768-1 (1990): Covers tolerances for linear and angular dimensions without individual tolerance indications. It defines four tolerance classes: f (fine) , m (medium) , c (coarse) , and v (very coarse) .
  2. ISO 2768-2 (1989): Covers geometrical tolerances (form: straightness, flatness, circularity, cylindricity; and orientation: parallelism, perpendicularity, symmetry, runout) for features without individual indications. It defines three tolerance classes: H (fine) , K (medium) , and L (coarse) .

What is ISO 2768? The Foundation

Before diving into the specific "mH" class, we must understand the standard. ISO 2768 is split into two parts: iso 2768-mh tolerance chart

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