Extra Quality — Iso 2768 -2

| Characteristic | Tolerance (Class K) | |----------------|---------------------| | | 0.1 mm per 100 mm length | | Flatness | 0.2 mm per 100 mm × 100 mm | | Perpendicularity | 0.2 mm per 100 mm length | | Symmetry | 0.2 mm per feature length | | Circular runout | 0.1 mm (for class K) | ✅ Note: These values vary with nominal size ranges (0.5–30 mm, 30–100 mm, 100–300 mm, etc.). Always refer to the full ISO 2768-2 table. 5. Special Case – Circular Runout Circular runout tolerance is defined separately:

| Class | Runout tolerance (mm) | |-------|------------------------| | H | 0.05 | | K | 0.10 | | L | 0.20 | iso 2768 -2

For circular runout, classes H, K, L correspond to specific tolerance values (see Section 5). 4. Toleranced Geometrical Characteristics The following characteristics are covered (all values in mm, unless stated otherwise). Example values for class K (medium) – typical for parts up to nominal size 100 mm: Special Case – Circular Runout Circular runout tolerance

| Class | Description | Typical Application | |-------|-------------|----------------------| | | Precision | High-precision machining | | K | Standard (most common) | General machining | | L | Coarse | Rough machining / castings | Example values for class K (medium) – typical