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
To interpret the ISO 2768-MH tolerance chart, follow these steps: iso 2768-mh tolerance chart
If you work in mechanical design or manufacturing, you’ve likely seen the notation on a drawing title block. is a combination designation used in engineering drawings
| Nominal Length Range (mm) | Tolerance (mm) | |--------------------------|----------------| | ≤ 10 | 0.02 | | >10 to 30 | 0.05 | | >30 to 100 | 0.1 | | >100 to 300 | 0.2 | | >300 to 1000 | 0.3 | | >1000 to 3000 | 0.4 | | Nominal Length Range (mm) | Tolerance (mm)
Tolerances for angles when no individual tolerance is given.
Example 3 — Angular dimension 90° with ISO 2768‑m:
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