Pdf | Iso 20457 Tolerance Table

In the world of manufacturing and mechanical engineering, precision is not just a goal—it is a language. When two parts from different suppliers in different countries must fit together perfectly, engineers rely on a standardized vocabulary of tolerances. One of the most critical, yet often overlooked, documents in this domain is ISO 20457 .

Note: This table is a representative summary. The official ISO 20457 PDF contains exact values and footnotes regarding chamfers, radii, and external/internal dimensions. Angles are treated differently because the deviation is measured as a length over a given length (mm/m) or directly in degrees/minutes. iso 20457 tolerance table pdf

Unlike specific tolerance standards that apply to one type of feature (like ISO 286 for holes and shafts), ISO 20457 provides a . It helps design engineers and quality managers group parts based on their precision needs. In the world of manufacturing and mechanical engineering,

Using the "Medium" class for a 45mm part, the linear tolerance is ± 0.8 mm. This means your part can be 44.2 mm to 45.8 mm. Note: This table is a representative summary