| Component | Meaning | | :--- | :--- | | | Indicates an external spline (shaft). | | N (Nabe) | Indicates an internal spline (hub). | | 120 | Reference Diameter [mm] (not the major/minor diameter). | | 3 | Module [mm] (determines tooth size). | | 38 | Number of Teeth . | | 8f | Tolerance Class ( 8 = tolerance grade, f = deviation series for external splines). |
When implementing DIN 5480 profiles into a mechanical design, keep the following manufacturing realities in mind:
| Class | Fit Type | | :--- | :--- | | | Sliding / Clearance fits | | h / H | Line-on-line fit (standard) | | j–v / J–M | Interference / Press fits |
): The total count of spline teeth around the circumference. Fixed at 30° for all standard DIN 5480 profiles. Fundamental Calculations
The standard is divided into multiple parts, often found in PDF technical guides: Part 1 - Cloudfront.net Din 5480 Pdf
: The primary method for centering the hub and shaft, ensuring they stay perfectly aligned even under heavy rotation. Deciphering the Code
Pay close attention to the root fillets. Sharp corners create massive stress risers that lead to premature fatigue failure under cyclic torsional loading.
Because involute teeth are curved, machinists cannot easily use standard calipers to measure tooth thickness. DIN 5480-15 specifies the "Measurement over Pins" (for shafts) or "Measurement between Pins" (for hubs). Two precision pins/balls of a specific diameter ( DMcap D sub cap M ) are placed in opposing tooth spaces.
Standardized tooth thickness allowances for explicit tolerance classes. | Component | Meaning | | :--- |
DIN 5480 PDF, DIN 5480-1, DIN 5480-2, involute spline standard, download DIN 5480, Beuth Verlag, spline tolerance, W60x2x30.
Usually designated with uppercase letters (e.g., 9H, 8H).
🚫 Many free "DIN 5480 PDF" downloads online are scanned copies of the 1991 version (obsolete). The 2006 revision changed several tolerance tables. Always use the current version (2006 with possible amendments).
Defines the basic geometry, reference diameters, modules, and the fundamental structure of the tolerancing system. | | 3 | Module [mm] (determines tooth size)
DIN 5480 is a German standard published by the Deutsches Institut für Normung (DIN). It specifies the geometry, dimensions, tolerances, and gauging practices for involute splines based on module pitches.
As Elias opened the file, he was greeted by the familiar principles of . Unlike standard gears, these splines are based on reference diameters , a clever design choice that allows for easy slip-fitting of components like ball or roller bearings. The PDF outlined everything he needed:
DIN 5480 PDF: The Comprehensive Guide to Involute Splines The DIN 5480 standard is the cornerstone of engineering design for involute splines in mechanical transmission systems. Understanding its specifications is critical for designers, engineers, and manufacturers looking for high-torque transmission solutions. This guide covers the essential aspects of the DIN 5480 standard and the resources available in documents. What is DIN 5480?