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Understanding the history of DIN 7161 is crucial for using technical information correctly today. Like many standards, it has been revised and ultimately replaced by more up-to-date international versions as technology and practices have advanced. The standard was by DIN ISO 286-2:1990 (ISO system of limits and fits - Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts). This newer standard incorporated the same ISO system but aligned more closely with the evolving ISO 286 series. din 7161 pdf extra quality
The tolerance zones overlap. Depending on the actual manufactured sizes, the result could be either a slight clearance or a slight interference. This public link is valid for 7 days
The shaft is always larger than the hole. The parts must be forced together using a press or thermal expansion/contraction, creating a rigid, permanent bond (e.g., H7/p6 ). Can’t copy the link right now