Need looser? Use (coarse) for fabrication or weldments.
Using "Medium" tolerances for non-critical areas prevents the machine shop from over-engineering the part, which saves you money. iso 2768-mh tolerance chart
Angular tolerances are determined based on the length of the shorter leg of the angle being measured. Nominal Length Range (mm) Medium (m) Coarse (c) Very Coarse (v) ±1° Over 10 to 50 ±0°30' Over 50 to 120 ±0°20' Over 120 to 400 ±0°10' Over 400 ±0°5' ISO 2768-2 (H): Geometrical Tolerances Need looser
If a feature is critical for a "press-fit" (like a bearing housing) or requires extreme precision for airtight seals, . In those specific cases, you must manually define a tighter tolerance (e.g., +/- 0.01mm) directly on that dimension. . In those specific cases