Aerospace Turbine Housing and Stator Vane Assembly
A thin-walled cylindrical housing with integrated radial ports and internal stator vanes, completed in one multi-axis setup to hold coaxiality and profile within 0.005 mm.


This assembly is a thin-walled cylindrical housing integrated with multi-port radial features and internal aerodynamic guide vanes. Conventional 3-axis machine tools need multiple fixtures, which stack positioning error. KGL uses one multi-axis setup to anchor every feature to a single coordinate origin.
The Machining Challenge
Deep internal vane cavities, thin outer walls, radial ports at multiple angles, and sealing grooves all interact. Each re-fixture introduces runout. Handheld tools cannot validate complex internal geometry or multi-angle boss orientations.
How KGL Machines Complex Housings
- Simultaneous 5-axis machining. Continuous five-axis motion machines internal aerodynamic vanes while maintaining tool contact and surface continuity across thin sections.
- 3+2 axis positioning. Tool orientations lock at precise angles relative to the outer cylinder, allowing drilling, threading, and counterboring of radial bosses and port flanges in one cycle.
- One setup, full completion. Outer cylinder walls, seal grooves, internal vane profiles, and radial ports are machined from one origin, keeping coaxiality, circularity, and perpendicularity tight.
- Inspection. CMM and 3D optical scanning map full GD&T compliance against customer CAD models, with complete reports for every production lot.
Key Specifications
| Geometric feature | Industry standard | KGL premium | KGL ultra-precision |
|---|---|---|---|
| Position tolerance (multi-surface ports) | ±0.3 mm | ±0.015 mm | ±0.005 mm |
| Profile tolerance (curved vanes / GD&T) | ±0.05 mm | ±0.02 mm | ±0.008 mm |
| Coaxiality and cylindricity | ±0.025 mm | ±0.01 mm | ±0.005 mm |
| Angularity and perpendicularity | ±0.03 mm | ±0.015 mm | ±0.005 mm |
| Surface roughness (Ra) | 1.6 μm | 0.8 μm | 0.2 μm |
Materials and Applications
Materials
- Titanium Ti-6Al-4V Grade 5
- Inconel
- Aluminum AL7075-T6 / AL6061-T6
- Stainless 17-4 PH / SUS316L / SUS304
- PEEK / POM engineering polymers
Applications
- Turbine housings
- Stator vane rings
- Auxiliary power units
- Rocket propulsion components
- High-pressure pump housings
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