is the German industrial standard for involute splines based on reference diameters. Unlike many other standards, it uses a module-based system to define the teeth, which allows for standardized calculations of torque transmission and flank pressure.
This is the practical "lookup" part of the standard. It contains the massive data tables that engineers need daily: Din 5480 Pdf
: Sites like Scribd often host user-uploaded versions, though these may not always be the latest revision. Doppler Gear TechBit: DIN 5480 Spline Decoder is the German industrial standard for involute splines
– Many engineering websites provide free, non-copyrighted summaries of the key tables, formulas, and parameters from DIN 5480. Search for: It contains the massive data tables that engineers
| Teeth (z) | Reference Diameter (d(_B)) | Major Diameter ext. (d(_ae)) | Minor Diameter int. (d(_ii)) | Root diameter ext. (d(_fe)) | |-----------|----------------|-----------------------------|-----------------------------|----------------------------| | 21 | 42.0 mm | 46.000 mm | 38.000 mm | 36.800 mm | | 24 | 48.0 mm | 52.000 mm | 44.000 mm | 42.800 mm | | 30 | 60.0 mm | 64.000 mm | 56.000 mm | 54.800 mm |
🚫 Many free "DIN 5480 PDF" downloads online are scanned copies of the 1991 version (obsolete). The 2006 revision changed several tolerance tables. Always use the current version (2006 with possible amendments).