Din 5480 Calculator [work] -

Computes diameters.

: [ d_{ae} = d + 2 \cdot m \cdot h_{aP}^* ] with (h_{aP}^* = 0.45) for side fit (DIN 5480-1 Table 1).

: (d_{ref}=30) mm, (z=20), α=30°, fit H/h, grade 6 Expected: m=1.5, (d_{ae}=33.3) mm, (d_{fe}=26.25) mm, tooth thickness nominal 2.356 mm, allowance 0 to -0.032 mm. din 5480 calculator

: [ d_{fe} = d - 2 \cdot m \cdot (h_{fP}^* + \rho_{fP}^ /m) ] where (h_{fP}^ = 0.45 + c^ ), (c^ = 0.25), (\rho_{fP}^* = 0.2) (fillet radius coefficient).

Applies deviations from embedded database. Computes diameters

Author: Engineering Software Lab Version: 1.0 Date: April 2026 Abstract This paper presents the design, mathematical foundation, and implementation of a DIN 5480 Calculator for involute splines with side fit. The tool computes key geometric parameters (module, number of teeth, pitch diameter, root fillet, space width, tooth thickness) and verifies fit classes (e.g., H‑h, H‑k, H‑f). Validation against standard tables and tolerance recommendations is provided. 1. Introduction DIN 5480 is the German standard for involute splines with a reference diameter instead of a pitch diameter as in ISO 4156. It is widely used in automotive, aerospace, and general mechanical drive systems.

: [ d_b = d \cdot \cos\alpha ]

Checks interference conditions.