Iso 2768 Angular Tolerance Now

If you have ever sent a 2D drawing to a machine shop and received a call asking, “How tight do you actually need this chamfer to be?” — you have experienced the gap between "design intent" and "manufacturing reality."

(Note: ′ = minutes of arc. 60′ = 1 degree.) iso 2768 angular tolerance

Instead, the permissible deviation is calculated based on the length of the shorter leg of the angle. Why? Because a 0.1mm gap at the tip of a 5mm corner is massive. The same 0.1mm gap at the tip of a 500mm beam is negligible. If you have ever sent a 2D drawing