The standard is divided into two main parts, commonly referred to as and Part B :
is a now-withdrawn German standard (absorbed into ISO 5817 / ISO 13920 ), but its "B" classification remains widely used in legacy specifications, repair welding, and some heavy fabrication sectors in Central Europe.
In the context of DIN 8570 , "B" is one of four tolerance classes (A, B, C, and D) that define "customary workshop accuracy". Fine (strictest) Class B: Medium Class C: Coarse Class D: Very Coarse din 8570 b
While Part 1 (where "B" originates) covers linear and angular dimensions, DIN 8570-3 covers geometrical tolerances (straightness, flatness, and parallelism) using classes E, F, G, and H.
Note: Some tables reverse B1/B3 – always check the original drawing note. In original DIN 8570: . The standard is divided into two main parts,
Robotic welding systems cannot "see" variable root gaps the way a human welder can. They rely on repeatable geometry. DIN 8570 B Class 2 or Class 1 is essential for successful robotic or automated welding cells.
: It establishes a standard level of "customary workshop accuracy" for welding. By using this class, designers ensure that parts fit together without needing to meticulously specify every single dimension's tolerance. Tolerances : Accuracy grade Note: Some tables reverse B1/B3 – always check
In the world of welding, precision is not just about the skill of the welder; it is also about the language used on technical drawings. One of the most critical, yet often misunderstood, standards in German and European manufacturing is .
Why would a machinist choose a DIN 8570 B over a