In this exclusive guide, we provide a comprehensive breakdown of ISO 2768-1 & 2, practical examples, and a clear path to implementation. While we cannot host copyrighted PDFs directly due to intellectual property laws, this article serves as your complete technical reference. For a legally blank, editable template drawing note, refer to the "Exclusive Annex" at the end of this article. What is ISO 2768? (The "General Tolerance" Standard) ISO 2768 is an international standard that defines general tolerances for linear and angular dimensions without individual tolerance indications. It applies to parts that are produced by metal removal or formed from sheet metal.
General runout tolerance is always equal to the general tolerance for flatness (for cylindrical parts) or the larger of the two: flatness or perpendicularity. How to Read the Drawing Callout If a drawing says: GENERAL TOLERANCES ISO 2768-mK iso 2768 general tolerances pdf exclusive
For a 100mm tall feature, Grade H = 0.1mm deviation, Grade K = 0.2mm, Grade L = 0.4mm. In this exclusive guide, we provide a comprehensive
Always verify your tolerance class with your manufacturing partner. If they are a high-volume stamping house, they may prefer "c" (Coarse). If they are a precision tool & die shop, "f" (Fine) is automatic. When in doubt, default to Class m for 90% of mechanical parts. Looking for the official standard? Purchase the original PDF from the ISO store or your local standards body (ANSI, BSI, DIN) to ensure you have the legally binding document. Use this guide for daily reference. What is ISO 2768