: General principles and fundamental definitions for involute splines.
: A primary source for current versions of the spline standards. Din 5480 Pdf
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If you're looking for a for your own work, you could create one by compiling the necessary data tables from legitimate sample pages (often provided on publishers' websites as previews) or from engineering handbooks that reference DIN 5480. Din 5480 Pdf
You will find many websites offering a "free DIN 5480 PDF". Most of these are either: Din 5480 Pdf