A modern DIN 20550 broach is not always 100% dimensionally identical to the old DIN 5463. Engineers need the old PDF to compare specifications before retrofitting.

Unlike involute splines (which have curved, gear-like teeth), DIN 5463 splines have straight, parallel flanks.

| Profile Designation ( n x d1 x d2 ) | Number of Teeth ( n ) | Internal Diameter ( d1 , mm) | External Diameter ( d2 , mm) | | :--- | :--- | :--- | :--- | | 6 x 11 x 14 | 6 | 11 | 14 | | 8 x 46 x 54 | 8 | 46 | 54 | | 6 x 21 x 23 | 6 | 21 | 23 | | 6 x 46 x 54 | 6 | 46 | 54 |

Don't risk a recall. Obtain the standard from an authorized national standards body:

| Nominal Dimensions (Profile) | No. of Keys | Centering | d1 (mm) | d2 (mm) | b (mm) | D3 (mm) | e2 (mm) | f (mm) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 6 x 11 x 14 | 6 | interior | 11 | 14 | 3 | 9.9 | 1.55 | -- | | 6 x 16 x 20 | 6 | -- | 16 | 20 | 4 | 14.5 | 2.1 | 0.16 | | 6 x 21 x 25 | 6 | -- | 21 | 25 | 5 | 19.5 | 1.98 | 1.95 | | 6 x 26 x 32 | 6 | -- | 26 | 32 | 6 | 23.4 | 2.94 | 1.65 | | 6 x 32 x 38 | 6 | -- | 32 | 38 | 8 | 29.7 | 2.9 | 3.1 | | 8 x 32 x 36 | 8 | interior | 32 | 36 | 6 | 29.5 | 1.6 | 2.2 | | 8 x 42 x 48 | 8 | -- | 42 | 48 | 8 | 39.8 | 2.6 | 3.55 | | 8 x 46 x 54 | 8 | interior | 46 | 54 | 9 | 43.7 | 2.6 | 4.5 |

Spline Profile DIN 5463−n×d1×d2Spline Profile DIN 5463 minus n cross d sub 1 cross d sub 2 : Number of splines (keys) : Minor diameter (inside/bottom diameter of the shaft) : Major diameter (outside/top diameter of the shaft) : Width of the spline/keyway DIN 5463 Standard Dimension Chart (Light Series)

The DIN 5463 standard defines spline profiles based on three primary dimensions: the number of splines ( ), the minor diameter ( ), and the major diameter ( Profile Element Description Typically ranges from 6 to 20 for standard sizes. Inside Diameter ( ) The core diameter of the shaft (minor diameter). Outside Diameter ( )