Crowned involute spline for an aero-engine component
Reading a demanding spline drawing correctly, modelling it in KISSsoft and linking the crowning to manufacturing and inspection.
- Industry
- Aerospace
- Year
- 2026
- Sheet
- 6 / 7
- Client
- Precision component manufacturer
- Duration
- 2.5 days, including training
- Tools
- KISSsoft
- Standards
- ANSI B92.1, ISO 4156
Involute spline section (30° pressure angle) and lead crowning Cβ, exaggeratedSchematic, not to scale
The question
A flanged involute spline for an engine carried detailed tolerances and crowning charts. The manufacturer needed to confirm that the drawing data were consistent and to understand how the crowning would be produced and inspected.
What the customer received
- Technical report with the parametric profile and quality-control recommendations
- Documented KISSsoft model
- Half-day course for design and production engineers
Services: Gear and transmission calculation
What we did
- Reconstructed the theoretical profile: module, pressure angle, number of teeth, tolerance class, major and minor diameters, measurement over pins.
- Checked the tabular data, crowning charts and section dimensions against each other, and interpreted the crowning for alignment, load distribution and noise.
- Modelled the spline in KISSsoft with profile, tip modifications, lead crowning and reliefs, and verified tolerances and inspection dimensions.
- Taught a half-day course on producing and inspecting crowned splines: shaping, broaching, power skiving, heat treatment and metrology.
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