Use ISO 2768-mk for the majority of machined, cast, or 3D-printed metal parts where features assemble without extreme precision. Save specific tolerances only for critical interfaces. This practice will elevate your engineering drawings from ambiguous sketches to professional, internationally compliant manufacturing instructions.
This article provides an exhaustive deep dive into , explaining what it means, when to use it, how to interpret its tables, and its real-world implications for CNC machining, quality control, and design engineering. What is ISO 2768? Before focusing on the "mk" classification, it is essential to understand the parent standard. ISO 2768 is an international standard titled "General tolerances for linear and angular dimensions without individual tolerance indications." general tolerance iso 2768-mk
For the designer, using 'mk' cleans up drawings and signals a mature understanding of manufacturing realities. For the machinist, it provides clear, enforceable limits for size and geometry. For the quality engineer, it defines the precise inspection criteria. Use ISO 2768-mk for the majority of machined,
In the world of technical drawing and mechanical engineering, specifying every single dimension with a unique tolerance is impractical, time-consuming, and clutters the blueprint. This is where general tolerances come into play. Among the most widely recognized standards globally is ISO 2768 , and within that standard, the specific class "mk" represents a critical balance between manufacturing cost and precision. This article provides an exhaustive deep dive into