Din 5480 Spline Dimensions Pdf Verified

| z (Teeth) | d(_B) (Ref Dia) | d(_a) (Tip Dia) | d(_f) (Root Dia) | Form Dia d(_Ff) | | :--- | :--- | :--- | :--- | :--- | | 20 | 40.0 mm | 42.0 mm | 37.0 mm | 38.5 mm | | 24 | 48.0 mm | 50.4 mm | 44.4 mm | 46.2 mm | | 28 | 56.0 mm | 58.8 mm | 52.8 mm | 54.6 mm | | 32 | 64.0 mm | 67.4 mm | 60.2 mm | 62.8 mm |

Verification note: In DIN 5480, the tip diameter (d(_a)) is not simply d(_B) + 2m. It includes a profile shift factor (x*m). Always cross-reference the PDF's table against these known reference values.

The PDF usually contains an introduction explaining the advantage of the DIN 5480 geometry over straight-sided splines: din 5480 spline dimensions pdf verified

A widely circulated PDF titled DIN5480_Table.pdf (source: anonymous technical forum) was analyzed.

| Parameter | PDF Value | Verified Value (DIN 5480-1:2006) | Error | | :--- | :--- | :--- | :--- | | Module 1.0, z=28, da2 | 30.00 mm | 30.50 mm | -0.5 mm (critical) | | Over-ball diameter (external, dm=1.8mm) | 33.742 mm | 33.698 mm | +0.044 mm (out of tolerance) | | Fit class table for 9H | Missing | Provided | N/A | | z (Teeth) | d(_B) (Ref Dia) |

Conclusion: The PDF was a pre-standard draft from 1989, erroneously labeled as DIN 5480. Parts machined using this PDF would fail assembly.

Instead of a static PDF, many engineers use verified spline calculation software that embeds the DIN 5480 tables. Examples include: These tools output a "verification report" – essentially

These tools output a "verification report" – essentially a verified PDF specific to your spline dimensions.

The PDF must clearly distinguish:

Verification check: For module 2, z=24, dref=48mm → da2 should be 48.5mm (class H). Any deviation >0.1mm suggests an OCR error.