In the world of manufacturing and mechanical engineering, a technical drawing is a legal contract between the designer and the producer. But what happens when a dimension doesn't have an explicit tolerance block? Does the machinist aim for perfection? Does the inspector reject a part for being 0.1 mm too long?
Imagine you design a motor mount bracket with a hole pattern. The critical dimension is the center distance (100mm) for the motor bolts. You specify that as (tight tolerance). Tolerance Iso 2768 Mk Pdf
This standard explicitly excludes: