Without ISO 286, global manufacturing would be a mess. By following this code system, a shaft manufactured in Tokyo will fit perfectly into a hole machined in Berlin.
For example, if you have a shaft with a nominal diameter of 25mm and a tolerance class of k6 , you need the PDF (or a software tool based on it) to determine the upper and lower deviation limits. iso 286 pdf
Establishes the fundamental terminology, symbols, and mathematical bases for the code system. ISO 286-2: Tables of standard tolerance classes Without ISO 286, global manufacturing would be a mess
The standard is divided into two primary sections that define both the theoretical basis and the practical values used in manufacturing: Without ISO 286