Bearings pressed into housings, gear wheels on shafts. Common ISO designations: H7/p6 or H7/r6. 3. Transition Fits
DIN 7161 originated from the . However, the ISO system continued to evolve, leading to the publication of newer editions, such as ISO 286-2:1988 , which ultimately rendered the 1965 version obsolete.
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Pulley keys, machine tool spigots (easy assembly/disassembly). Transition Fit din 7161 pdf
Legitimate free versions are rare due to copyright. However, the Fraunhofer Institute and some German Landesbibliotheken offer free viewing (not download) of historical standards on-site. Always avoid pirated copies, as they often contain errors that could cause costly manufacturing defects.
Tolerance zone sits entirely above the zero line; guarantees a loose, free-moving assembly. Standard Baseline The lower deviation ( EIcap E cap I ) is exactly zero; the zero line acts as the strict floor. J through N Transition Fits
: It remains one of the clearest examples for students learning the fundamentals of the ISO system of limits and fits. Internal Documentation Bearings pressed into housings, gear wheels on shafts
The magnitude or size of the tolerance zone (represented by numbers).
Tolerance zone overlaps the zero line; can result in either minor clearance or minor interference depending on physical part variance. Interference Fits
Represented by letters, these dictate the position of the tolerance zone relative to the nominal size (the zero line). use uppercase letters (A through Z). Shafts use lowercase letters (a through z). Transition Fits DIN 7161 originated from the
Q: Can I use DIN 7161 for non-cylindrical parts? A: No, DIN 7161 specifically addresses plain cylindrical parts and is not applicable to non-cylindrical features.
Beuth is the official sales body for DIN standards. You can purchase the original DIN 7161 (withdrawn but archived) as a PDF. Prices typically range from €50 to €100. This gives you a searchable, high-resolution scan.