m) and are used to determine the maximum and minimum allowable diameters for a part to function correctly within an assembly. DIN7161 | PDF - Scribd
Anya was meticulous. She opened her company’s digital standards database. No results. She searched the internal PDF archive. Nothing. She turned to the global engineering forums. One thread from 2005 read: "DIN 7161 is withdrawn. Use DIN ISO 2768." Another user quipped: "DIN 7161 is the ghost standard—everyone references it, no one has a copy."
) provides the standardized ISO deviations for holes with nominal dimensions between 1 mm and 500 mm
: A story of uncertainty. Depending on the luck of the manufacturing run, the fit might be slightly loose or slightly tight, used for precise locations where parts are frequently disassembled. Why it Matters din 7161 pdf
It is based on the ISO system of limits and fits, specifically aligning with ISO/R 286:1962-12, which covers general, tolerances, and deviations. Key Details of DIN 7161: Defines deviations ( ) for internal dimensions (holes). Size Range: Covers nominal sizes from
Anya returned to her desk. She didn't find a DIN 7161 PDF. Instead, she found a solution: she flagged the drawing for revision, replaced the tolerance callout with "DIN ISO 2768-1-m," and added a note in the revision block: "Legacy standard DIN 7161 superseded. Tolerances verified against original conversion data."
is a historical technical standard titled "ISO Deviations for Holes for Sizes from 1 to 500 mm" (German: ISO-Abmaße für Innenmaße (Bohrungen) ). Published in August 1965, it served as a foundational document for the German system of limits and fits, specifically focusing on the internal dimensions of machined parts. Key Technical Details m) and are used to determine the maximum
Verifying if older, existing gauge blocks, go/no-go gauges, and reamers match the exact limits defined by the historical standard. How to Safely Find the Standard
Given these advancements, DIN 7161 is no longer recommended for new designs. It is, however, an important document for historical reference and maintaining legacy systems.
: It covers workpieces with a nominal size of up to 500 mm . [1] No results
The ghost was laid to rest.
When looking up in a DIN 7161 PDF index table, you will find the precise upper and lower deviations in micrometers ( ). For instance: 30 H7 corresponds to a tolerance zone of . The hole can be anywhere between 30.000 mm and 30.021 mm. 30 g6 corresponds to a tolerance zone of