Even with a great PDF, mistakes happen. Here is how to avoid them:
The magic of ISO 2768-1 lies in its four tolerance classes, which range from high precision to very loose manufacturing allowances. These classes are designated by single letters: iso 2768 general tolerances pdf exclusive
If a single feature on a part requires a hyper-precise fit (like a bearing bore), manually override the general standard by writing a specific tolerance next to that exact dimension on the drawing. Even with a great PDF, mistakes happen