Indicates the position of the tolerance zone relative to the nominal (basic) size.
ISO 286 (officially titled Geometrical product specifications (GPS) – ISO code system for tolerances on linear sizes ) is the international standard that defines the system of limits and fits for cylindrical workpieces. In simple terms, it tells engineers how much a manufactured part can deviate from its exact design size while still functioning perfectly. iso 286 pdf
: Include simplified versions of the ISO 286-2 Tables for the most commonly used nominal sizes (e.g., 3mm to 400mm). 4. Important Standard Nuances Indicates the position of the tolerance zone relative
The tolerance zones overlap. The shaft might be slightly smaller or slightly larger than the hole. This provides a snug fit but allows for assembly/disassembly. iso 286 pdf