DIN 5480 is the German standard for involute splines with a 30° pressure angle, widely used in the automotive, hydraulic, and aerospace industries. Unlike many other standards, DIN 5480 is based on reference diameters that are independent of the module, allowing for easy integration with standard bearing sizes. Key Components of DIN 5480

  • Module: The module (m) is the ratio of the pitch diameter to the number of teeth. Common modules for DIN 5480 splines are:

    pressure angle and profile displacement (shifting the teeth), the actual tip diameter of the shaft is modified to prevent interference with standard bearings. 🔍 How to Decode a DIN 5480 Callout

    2. Reference Diameter ($d$)

    This is the theoretical diameter where the tooth thickness equals the space width. $$d = m \times z$$