| Parameter | Symbol | Description | Verification Checkpoint | | :--- | :--- | :--- | :--- | | | m | Basic tooth size (mm) | Must match standard series (e.g., 0.5, 0.6, 0.8, 1, 1.25, 1.5, 2...10) | | Reference Diameter | d(_B) | Ideal calculation diameter | Equals m * z (rounded to preferred numbers) | | Tip Diameter (Shaft) | d(_a) | Outer diameter of external spline | Verify against table for given module/z | | Root Diameter (Shaft) | d(_f) | Base of teeth | Critical for stress analysis | | Form Diameter | d(_Ff) | Start of involute profile | Must be below start of active profile | | Space Width (Internal) | e | Width of groove in hub | Tolerance dependent on class (e.g., 8f, 9H) | | Tooth Thickness (External) | s | Width of tooth on shaft | Measured over pins or via gear measurement |
(depending on manufacturing method like hobbing or broaching). www.kisssoft.cz Tolerance & Fit Classes Tolerance classes range from , with lower numbers representing tighter tolerances. Slip Fits: Indicated by lowercase (Shaft) or uppercase Line-on-Line Fits: Indicated by (Shaft) or Interference Fits: Indicated by (Shaft) or Verified Technical References (PDF) din 5480 spline dimensions pdf verified
Most free PDFs floating on personal servers contain rounding errors (especially for "d_ee" and "d_ii" tolerances). For a verified source: | Parameter | Symbol | Description | Verification
Module 1.5, 26 teeth, Class 8f.
The DIN 5480 standard is the definitive German Industrial Standard for . Unlike the ISO 14 standard which covers straight-sided splines, DIN 5480 utilizes an involute tooth form (similar to gears) which provides superior centering, high load capacity, and ease of measurement. For a verified source: Module 1