For example, the code DIN 5480 W 50 x 2 x 24 x 8h perfectly defines an external spline with a reference diameter of 50 mm, module 2, 24 teeth, and a shaft fit tolerance of 8h .
Several companies offer a free "DIN 5480 Calculator" that outputs a custom dimension PDF for your specific spline:
When you finally locate a , you will find several crucial tables. Here is a summary of the data you need for modules 0.5 to 10.
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A is an invaluable tool for mechanical designers, machinists, and quality control inspectors. By understanding the foundational elements—the 30° pressure angle, the relationship between reference diameter and module, and the alphanumeric designation codes—you can eliminate calculation errors, choose the correct machining tools, and ensure perfect power transmission in your assemblies.
Here are some key dimensions and characteristics of DIN 5480 splines:
Involute splines are critical mechanical components used to transmit high torque between shafts and bores while maintaining precise coaxial alignment. Among the various international standards governing spline geometry, is one of the most widely adopted frameworks in European and global mechanical engineering. For example, the code DIN 5480 W 50
Splines are typically centered by the flanks of the teeth, allowing minor clearances at the major and minor diameters. Module System: Uses metric modules ( ) ranging from 0.5 to 10 to define tooth size. 2. Structure of the DIN 5480 Standard Series
: Provides visual context for internal and external spline fits. Doppler Gear Basic Calculation Formulas
(Note: Actual dimensional values in official documentation fluctuate based on tolerance selections like 9H, 7h, or 8f to account for backlash requirements). 6. Fits, Tolerances, and Backlash This public link is valid for 7 days
When searching online for a "DIN 5480 spline dimensions PDF" to use in an engineering project, keep the following best practices in mind:
The distance between corresponding points on adjacent teeth along the pitch circle: p=π×mp equals pi cross m Major and Minor Diameters
Note: Minor variations in the addendum and dedendum modifications exist based on whether the fit is side-bearing (standard) or diameter-bearing. 5. Fit Types and Tolerances
DIN 5480 uses a tolerance system adapted from the standard ISO fit system to control backlash and interference. Tolerance Classes (Quality Levels) Range from . Class 4 is the most precise (aerospace/instrumentation).
| Parameter | External Spline (Shaft) | Internal Spline (Hub) | |-----------|------------------------|----------------------| | Reference diameter | 60.0 mm | 60.0 mm | | Tip diameter | 64.0 mm | 56.0 mm | | Root diameter | 55.0 mm | 65.0 mm | | Space width / Tooth thickness (max/min) | 3.1416 / 3.0916 mm | 3.1916 / 3.1416 mm |