| Feature | Specification | |---------|----------------| | Module Range | 0.5 to 10 mm | | Pressure Angle | 30° (primarily) and 37.5°, 45° (less common) | | Fit Type | Side fit (centering on flanks) | | Number of Teeth | Even numbers typically, from 6 to 60+ | | Tolerance System | Class 1 (tight), Class 2 (medium), Class 3 (loose) | | Application | Steering columns, PTO shafts, machine tools, hydraulic pumps |
Note: DIN 5482 was largely superseded by DIN 5480 (which uses a modular reference diameter system) and ISO 4156. However, legacy equipment—especially tractors, old lathes, and German military vehicles—still rely on DIN 5482 dimensions.
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The module defines the tooth size:
[ m = \frac\textpitch diameterN ]
where ( N ) = number of teeth.
DIN 5482 uses standard modules: 0.5, 0.75, 1.0, 1.25, 1.5, 2.0, 2.5 mm.
First, a quick history lesson. DIN 5482 is a German standard for involute splines with a reference diameter system. Unlike the more modern ISO 4156 or ANSI B92.1 (which use a modular system based on pitch), DIN 5482 uses a profile shift system designed for thin-walled hubs. Note: DIN 5482 was largely superseded by DIN
Published in its final form in the 1950s (with major revisions in 1973—hence the "77" confusion), it solved a specific problem: How do you cut splines on a shaft without weakening the core?
The answer was a low profile shift coefficient (typically x = 0.45 to x = 0.6). This creates a spline that is stronger in torsion than a straight-sided spline, but easier to broach than a full-depth involute. If you are creating content for this keyword, you should:
The pain point: DIN 5482 was officially withdrawn in 1996. The German Institute for Standardization (DIN) replaced it with ISO 4156. However, millions of machines, pumps, and steering boxes still use the old geometry. The standard exists only in "historical" form.
Given that DIN 5482 has been officially withdrawn, new designs should not use it. However, for maintenance, repair, and overhaul (MRO) of legacy systems, it remains essential.
The core geometry of DIN 5482 follows the involute function, but with specific modifications: