Involute Splines Component Generator
Concept Procedure Quick Reference

Calculates and designs involute spline joints. Generator designs an applicable spline width, bending, and pressure loading are also checked. Only shaft teeth are part of the calculation because the stress in the shaft is greater than the hub teeth that have a greater root thickness.

Couplings with involute splines are suitable for transfers of great, cyclical, and shock torsional moments. This type is used both for fixed and for sliding couplings of cylindrical shafts with hubs. The use is similar as with parallel splines.

Advantages of the coupling:

Advantages of the coupling compared with parallel splines:

Disadvantages of the coupling:

The splined profile is shaped as involute toothing in the cross section, with basic angles of the profile 30°, 37.5° or 45°. It is centered to the outer diameter or sides of the teeth. Centering to the diameter is more accurate, centering to sides is more economical and is used much more frequently in practice The groove bottom can be flat or rounded.

Tip See the Engineer's Handbook for used calculation formulas and other instructions for designing involute spline joints.