Din 5480 Spline Dimensions Pdf //top\\ -

1. Understand DIN 5480

Understanding DIN 5480 Spline Dimensions: A Comprehensive Guide

DIN 5480 defines the standard for metric involute splines used in mechanical engineering.

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: Excellent for decoding spline callouts and understanding basic geometry. eAssistant Manual

  • Module sizes (0.5 to 10 mm)
  • Number of teeth (typically 6 to 82)
  • Pitch diameters
  • Root and tip diameters (internal & external)
  • Space width and tooth thickness tolerances
  • Centering methods (side fit, major diameter fit)
  1. Confusing major/minor diameters: Unlike ANSI splines where the minor diameter centers, DIN 5480 centers on the flanks. The major diameter has a deliberate clearance gap.
  2. Using the wrong pressure angle: Always check the PDF’s header. Some older tables include 37.5° data. Mixing a 30° shaft with a 37.5° hub will destroy both.
  3. Ignoring the "W" vs "Z" designation: The PDF provides separate columns for internal (W) and external (Z) dimensions. Using the external shaft data for a hub cut-out will result in a loose fit.
  4. Outdated standards: DIN 5480 was revised in 2005 to align with ISO 4156. If your PDF is from 1985, the tolerance classes (e.g., H/h) have changed.

Before you open a PDF, you must understand the naming convention. A typical DIN 5480 designation looks like this: din 5480 spline dimensions pdf

  • Reference diameter = m × z
  • Major dia external = m × (z + 1)
  • Minor dia external = m × (z – 1.5)
  • Form diameter (internal/external) – see DIN 5480-2 for exact limits