Technologies
Aerospace CNC machining is the computer-controlled subtractive manufacturing process used to produce high-precision aircraft, spacecraft, and defense components from materials such as aluminum alloys,
Aerospace CNC machining is the computer-controlled subtractive manufacturing process used to produce high-precision aircraft, spacecraft, and defense components from materials such as aluminum alloys, titanium, and Inconel, delivering tolerances as tight as ±0.005mm to meet AS9100 Rev D and ISO 286
Aerospace CNC machining is the computer-controlled subtractive manufacturing process used to produce high-precision aircraft, spacecraft, and defense components from materials such as aluminum alloys, titanium, and Inconel, delivering tolerances as tight as ±0.005mm to meet AS9100 Rev D and ISO 286 standards.
CNC machining dominates aerospace component production for five critical reasons:
Precision and repeatability — Aerospace parts demand tolerances of ±0.005mm to ±0.025mm (IT6 grade per ISO 286), far tighter than commercial parts. CNC machines hold these consistently across production runs.
Complex geometry capability — 5-axis CNC mills produce intricate structural brackets, turbine features, and manifold housings in a single setup, eliminating stacking errors.
Material range — CNC processes handle 7075-T6 aluminum (AMS 2770), Ti-6Al-4V titanium (AMS 4928), and Inconel 718 — materials required for flight-critical components.
Surface finish control — Critical sealing surfaces require Ra 0.8 µm or better per ISO 1302, achievable through CNC grinding and fine milling passes. EDM reaches Ra 0.4 µm on hardened tool steel cavities.
Compliance and traceability — Aerospace suppliers under AS9100 Rev D certification provide documented process control, material certificates, and inspection records required for aviation qualification.
7075-T6 Aluminum dominates structural applications due to its high strength-to-weight ratio. Specification AMS 2770 covers heat treatment requirements; this alloy is standard for airframe skin and fuselage components.
Ti-6Al-4V titanium (per AMS 4928) is the primary choice for engine components, fasteners, and hydraulic housings operating at elevated temperatures. It retains 50% of room-temperature strength at 300°C.
Inconel 718 is used in turbine blades, compressor discs, and engine casings where operating temperatures exceed 650°C. CNC machining of Inconel requires specialized carbide tooling due to work-hardening.
17-4PH stainless steel provides corrosion resistance for landing gear fittings, valve bodies, and environmental-control system components.
The table below maps CNC processes to typical aerospace components and achievable tolerances:
| Process | Best For | Typical Tolerance |
|---|---|---|
| CNC Milling | Structural brackets, housings, panels | ±0.01mm |
| CNC Turning | Shafts, bushings, fittings, nozzle bodies | ±0.005mm |
| EDM (Wire/Sinker) | Complex cavities, turbine features, hardened tool steel | ±0.003mm |
| CNC Grinding | Sealing surfaces, bearing seats, tight-fit bores | Ra 0.4 µm |
CNC milling produces structural components with pocket features, bosses, and mounting surfaces. Multi-axis mills eliminate fixture repositioning, maintaining positional accuracy across complex part geometry.
CNC turning machines cylindrical components including hydraulic actuator shafts, engine nozzle bodies, and precision bushings. When you need CNC machining services in Egypt, turning achieves the tightest rotational tolerances (±0.005mm) in the CNC family.
EDM machining is essential for hardened aerospace tool steel components and internal cavities where traditional cutting tools cannot reach. Wire EDM tolerances of ±0.003mm exceed milling capabilities.
Entag machines aerospace-grade aluminum, titanium, and stainless steel components to ±0.005mm tolerances for customers across Egypt and Saudi Arabia including Cairo, Alexandria, Jeddah, Riyadh, and Dammam. Our sheet metal fabrication in Egypt and AS9100-ready quality systems ensure traceability and compliance documentation for flight-critical applications.
What tolerances can be achieved with aerospace CNC machining?
Aerospace CNC machining typically achieves tolerances between ±0.005mm and ±0.025mm depending on the process. CNC turning reaches ±0.005mm for rotational parts, while EDM achieves ±0.003mm for complex features in hardened steel dies. These tolerances meet AS9100 requirements for critical flight components including structural brackets, fittings, and actuation parts used in commercial and military aircraft.
Which materials are most commonly used in aerospace CNC machining?
The most common aerospace CNC materials are 7075-T6 aluminum (high strength-to-weight ratio, per AMS 2770), Ti-6Al-4V titanium (per AMS 4928, used in structural and engine components), Inconel 718 (high-temperature engine parts exceeding 650°C), and 17-4PH stainless steel (corrosion-resistant fittings and landing gear). Material selection depends on operating temperature, load, and certification requirements specified in engineering drawings.
What surface finish is required for aerospace CNC machined parts?
Aerospace components typically require Ra 0.8 µm or better for critical mating and sealing surfaces per ISO 1302. Bearing seats and hydraulic bores may require Ra 0.4 µm achieved through CNC grinding with ceramic or diamond stones. Non-critical structural surfaces may accept Ra 1.6 µm. Engineering drawings always specify required surface finish for each feature.
Does Entag machine aerospace parts for companies in Saudi Arabia?
Yes. Entag serves aerospace and defense manufacturing clients in Saudi Arabia including Riyadh, Jeddah, and Dammam, in addition to Egypt. Parts are machined to aerospace tolerances at our Cairo facility and shipped regionally. Engineers can upload CAD files directly and request a quote on Entag within 24 hours.
What is AS9100 and why does it matter for aerospace CNC machining?
AS9100 Rev D is the international quality management standard for the aerospace industry, extending ISO 9001 with requirements specific to aviation safety, risk management, and traceability. Aerospace CNC machining suppliers operating under AS9100 provide documented process control, material traceability, and inspection records required for flight-critical and defense components.
Can CNC machining produce complex aerospace geometries like turbine blades or brackets?
Yes. 5-axis CNC milling machines complex aerospace geometries including turbine blade profiles, structural airframe brackets, and manifold housings in a single setup, eliminating fixture errors. EDM is used for internal cavities and features in hardened materials where milling is not feasible. Both processes are available at Entag for aerospace applications.
Ready to start your aerospace project? Request a quote on Entag — upload your CAD file and get a price in 24 hours.
