This part of the standard mainly applies to features produced by removal of material and contains tables that define permissible deviations for each geometrical characteristic.
The standard is divided into two distinct sections, often used together but applicable independently:
Geometrical tolerances apply to the relationships between different surfaces and features of a component. 1. Straightness and Flatness Tolerance Class Up to 10mm 10 to 30mm 30 to 100mm 100 to 300mm 300 to 1000mm K L 2. Perpendicularity Tolerance Class Up to 100mm 100 to 300mm 300 to 1000mm H K L 3. Symmetry Tolerance Class Up to 100mm 100 to 300mm 300 to 1000mm H K L How to Read an ISO 2768 Callout on a Drawing Iso 2768 General Tolerances Pdf
TOLERANCES: ISO 2768-m
The official ISO 2768 standard is a copyrighted document. You must purchase it from an authorized standards reseller. Several online stores offer the official PDF for purchase and immediate download. This part of the standard mainly applies to
. It is widely considered an industry essential for machining and sheet metal work. ISO - International Organization for Standardization Overview of ISO 2768 The standard is split into two critical parts: ISO 2768-1 linear and angular dimensions (e.g., lengths, diameters, radii, and chamfer heights). ISO 2768-2 geometrical tolerances
For form tolerances (flatness, straightness, perpendicularity, symmetry, runout). Same classes H, K, L (but H most common). Straightness and Flatness Tolerance Class Up to 10mm
Reduces the number of specific tolerance callouts on a drawing, making it cleaner and easier to read. Efficiency: