Addresses the "shape" and "position" of features, including straightness, flatness, perpendicularity, symmetry, and circular run-out. It uses three tolerance classes: H, K, and L . Common Applications
For structural components, rough castings, or sheet metal work with lenient requirements. iso 2768 general tolerances pdf exclusive
When a drawing references ISO 2768, manufacturers automatically know the permissible variations based on the size of the component and the chosen accuracy class. Why Use ISO 2768 General Tolerances? Addresses the "shape" and "position" of features, including
In mechanical engineering and precision manufacturing, clear technical drawings are the bridge between design intent and physical reality. Specifying individual tolerances for every single dimension on a complex drawing is time-consuming and cluttering. This is where the ISO 2768 standard becomes indispensable. Straightness and Flatness
In precision manufacturing, specifying individual tolerances for every single dimension on a technical drawing is inefficient. It clutters blueprints, increases design time, and drives up production costs.
When manufacturing parts, knowing the standard is just the first step. If you are preparing to send files for production, you can:
Medium geometric control (the industry standard pairing with class 'm') L: Coarse geometric control It defines limits for three main geometric categories: 1. Straightness and Flatness