The search for "DIN 7161 pdf extra quality" points toward the historical German engineering standard ISO allowances for internal dimensions (holes) for nominal sizes between 1 mm and 500 mm Standard Overview: DIN 7161
: The most authoritative source would be the official DIN website. They offer standards for purchase and download. You would need to search for DIN 7161 specifically. Be aware that standards can be copyrighted and purchasing them directly supports the development of new standards. din 7161 pdf extra quality
Because DIN 7161 is a legacy standard, users often seek it in PDF format for historical reference or when maintaining older machinery designed to these specifications. Official Downloads: You can purchase historical versions through Reference Materials: Various technical manuals from companies like Hansa-Flex The search for "DIN 7161 pdf extra quality"
If you secure a high-resolution copy of DIN 7161 (before its withdrawal), you will find four primary tolerance classes. These are identical in concept to the later ISO 2768, though table values differ slightly in older editions. Be aware that standards can be copyrighted and