While many people rush to the complex charts of ISO 286, there is one specific standard that solves a very common problem: That standard is DIN 7161 .
In plain English: It tells you exactly how much smaller a shaft should be compared to a hole so that they fit together easily without force, but also without excessive wobble. din 7161 pdf
If you work in mechanical design or precision manufacturing, you know that a successful assembly depends on more than just matching diameters. It depends on tolerances . While many people rush to the complex charts