DIN 5480 is the gold standard for involute splines with 30° pressure angles. Finding a is critical for engineers ensuring high-torque transmission and precise fit. ⚙️ Understanding DIN 5480 Standards
: Indicates whether the component is a shaft ( W for Welle ) or a hub ( N for Nabe ). 120 : The reference diameter ( 3 : The module ( 38 : The number of teeth (
The information provided in this write-up is based on the DIN 5480 standard. For further information and verification, please refer to the official DIN 5480 standard or consult with a qualified engineer or manufacturer. A PDF version of the standard can be obtained from the DIN website or other authorized sources.
The defines involute splines based on reference diameters, which simplifies the assembly of components like bearings. Unlike other standards that use major or minor diameters as the primary identifier, DIN 5480 uses a Reference Diameter ( dBd sub cap B ) that is independent of the module. Verified Spline Dimension Data din 5480 spline dimensions pdf verified
Example: DIN 5480 – W 45 x 2 x 24 x 9H
Unlike other standards that fix diameters based on tooth counts, DIN 5480 uses to make the spline fit the space you already have. 📐 Core Dimensions & Geometry Every DIN 5480 spline is defined by its Module ( ), Reference Diameter ( dBd sub cap B ), and Number of Teeth ( ). Formula / Value Pressure Angle Always 30∘30 raised to the composed with power Pitch Circle ( ) Addendum ( ) Dedendum ( ) to (varies by tool) Tip Diameter ( ) 🛠️ How to Read the Code
DIN 5480 applies the standard ISO deviation letters to control tooth thickness (backlash): DIN 5480 is the gold standard for involute
Ensure the PDF accounts for the machining method (broaching vs. hobbing) as this affects the root clearance.
da2=m×z−(0.9×m)d sub a 2 end-sub equals m cross z minus open paren 0.9 cross m close paren : The root diameter of the internal teeth.
The standard defines splines by the module ($m$), number of teeth ($z$), and pressure angle ($\alpha$). 120 : The reference diameter ( 3 :
The DIN 5480 spline dimensions are crucial to ensure proper fit and function of the spline connection. The standard provides a set of rules and guidelines for designing and manufacturing splines, which helps to:
DIN 5480 is not interchangeable with ANSI B92.1 (which uses 30°, 37.5°, and 45° angles).
: These are adjusted based on the profile shift to maintain a standardized clearance ( ), typically Addendum ( ) and Dedendum ( ) : Standard values are often for the addendum and for the dedendum in hobbed splines. Verification and Measurement Din 5480-1 | PDF - Scribd
: Principles, basic geometry, modules, reference diameters, and fit system.
) , which closely aligns with the major diameter of the shaft. This makes it highly intuitive for designers who are sizing splines to fit standard bar stock or bearing bores.