En — Iso 13920-bf [exclusive]

| Nominal Size (mm) | Permitted Deviation (Class B) | | :--- | :--- | | Up to 120 | 1 mm | | 120 to 400 | 2 mm | | Over 400 | 3 mm |

This is the tolerance class for lengths (like the distance between two plates) and angles. Class en iso 13920-bf

The feature is a combined designation for general tolerances in welded constructions. It specifies an accuracy level for both dimensional and geometric variations on technical drawings. The designation breaks down as follows: | Nominal Size (mm) | Permitted Deviation (Class

is a technical specification used in engineering drawings to define general tolerances for welded constructions . It ensures that parts are manufactured to a consistent, economically viable level of precision without requiring individual tolerances for every dimension. Breakdown of the Specification The designation breaks down as follows: is a

The code is split into two distinct parts that cover different geometric features: B (Linear and Angular Dimensions):

To truly understand "EN ISO 13920-BF," you must know the numbers. Below are the key tolerance ranges for (Medium).