DIN 7161 does not just cover straight lines. For angles where no specific tolerance is given, the standard permits deviations based on the shortest leg length of the angle. For "Medium" quality, a 100mm leg allows roughly ±0.5 degrees.
The primary function of DIN 7161 is to define tolerance classes based on nominal dimension ranges. din 7161 pdf extra quality
DIN 7161 represents the "extra quality" benchmark for simplifying engineering drawings. By establishing precise general tolerances for linear and angular dimensions without individual indications, it streamlines the design process and ensures manufacturing clarity. While largely superseded internationally by ISO 2768-1, DIN 7161 remains a hallmark of German engineering precision and is a critical document for quality assurance in specific manufacturing contexts. DIN 7161 does not just cover straight lines