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✅ The default is usually "Medium (m)". Very Coarse must be deliberately chosen.
ISO 2768-1 specifies tolerances for linear and angular dimensions. The iso 2768 vl pdf
In a machine shop or engineering office, the PDF version of the standard is arguably the most referenced document. Here is why the search for "iso 2768 vl pdf" is so common:
Avoid writing "VL" as two separate letters; use lowercase "v" to stay consistent with the official standard. ISO 2768-1 specifies tolerances for linear and angular
This suggests a part that is manufactured with low precision requirements, likely a raw casting, a rough structural component, or a non-critical element of an assembly.
You will often see search results offering free downloads. However, be aware: This suggests a part that is manufactured with
Depending on the required precision, engineers choose from several classes. For linear and angular dimensions (Part 1), these are designated by lowercase letters: : High precision. m (medium) : Standard workshop accuracy (most common). c (coarse) : For less critical parts. v (very coarse) : Minimal precision requirements.
The callout is actually a combination of and "L" :
If using ISO 2768‑2 (geometrical tolerances), class v is also the loosest grade. For flatness, straightness, etc., values are larger than classes H, K, or L.
