| Code | Meaning | Application | | :--- | :--- | :--- | | | Fine (Linear tolerance class) | For dimensions like lengths, steps, diameters, radii, chamfers. | | K | Medium (Geometric tolerance class) | For form & position (straightness, flatness, perpendicularity, symmetry, runout). | Note: The full standard also includes "m" (Medium) and "c" (Coarse) for linear, and "L" (Coarse) for geometric. Key Tolerances for ISO 2768-FK (Metric, mm) Part 1 – Linear Dimensions (Class "F" - Fine)
Why is this important? Not every dimension on a drawing needs a specific tolerance block. For features where standard workshop accuracy is sufficient, ISO 2768-FK saves time, reduces costs, and keeps drawings clean. What is ISO 2768? ISO 2768 is the international standard for general tolerances for linear and angular dimensions without individual tolerance indications.
| Characteristic | Tolerance per 100mm | | :--- | :--- | | Straightness & Flatness | 0.1 mm | | Perpendicularity | 0.2 mm | | Symmetry | 0.5 mm | | Runout | 0.1 mm |
Iso 2768 Fk =link= -
| Code | Meaning | Application | | :--- | :--- | :--- | | | Fine (Linear tolerance class) | For dimensions like lengths, steps, diameters, radii, chamfers. | | K | Medium (Geometric tolerance class) | For form & position (straightness, flatness, perpendicularity, symmetry, runout). | Note: The full standard also includes "m" (Medium) and "c" (Coarse) for linear, and "L" (Coarse) for geometric. Key Tolerances for ISO 2768-FK (Metric, mm) Part 1 – Linear Dimensions (Class "F" - Fine)
Why is this important? Not every dimension on a drawing needs a specific tolerance block. For features where standard workshop accuracy is sufficient, ISO 2768-FK saves time, reduces costs, and keeps drawings clean. What is ISO 2768? ISO 2768 is the international standard for general tolerances for linear and angular dimensions without individual tolerance indications. iso 2768 fk
