| Attribute | Details | | :--- | :--- | | | DIN 7161 | | Title (English) | ISO Allowances for Internal Dimensions (Holes) for Nominal Dimensions from 1 to 500 mm | | Title (German) | ISO-Abmaße für Innenmaße (Bohrungen), für Nennmaße von 1 bis 500 mm | | Publication Date | August 1, 1965 | | Number of Pages | 8 pages | | Status | Withdrawn / Superseded | | Replaced By | DIN ISO 286-2:1990 | | Language | German (original) | | Replaced | DIN 7161-5 (April 1942) |
DIN 7161 recommends the use of specific materials for the bearing components, such as:
While DIN 7161 was a cornerstone of German industry, it has largely been superseded or integrated into the broader system. This transition represents the globalization of engineering standards, allowing a design created in Europe to be manufactured with identical "extra quality" precision in any other part of the world.
Tables of standard tolerance classes and limit deviations for holes and shafts. din 7161 pdf extra quality
) expands as the nominal part size increases. This non-linear growth accommodates the practical real-world challenges of maintaining extreme precision over larger physical workpieces. Verification: Why "Extra Quality" PDFs are Necessary
Represent holes (internal dimensions). 3. Tolerance Grades (Numbers)
: Provides precise numerical values (often in micrometers, | Attribute | Details | | :--- |
DIN 7161 specifies the permissible deviations (tolerances) for internal dimensions, specifically for holes. It is designed to work in conjunction with broader systems of limits and fits, such as those found in DIN ISO 286-2. : Covers nominal diameters from 1 mm to 500 mm .
Combined with the letters, grades from 4 to 16 are typically included, representing the precision of the hole (e.g., H7, J8, F7).
When you open a high-quality DIN 7161 reference document, you will typically see a grid structure. Here is how to navigate it step-by-step: ) expands as the nominal part size increases
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Covers nominal dimensions (bores) ranging from 1 mm up to 500 mm 1.2.4 .
Are you working on or looking for historical references ?
What are you designing for (e.g., rotating shaft, tight press fit)?
The standard categorizes fits into three primary groups based on the relationship between the mating parts:
