Aerospace CNC Machining: ITAR, AS9100, Exotic Alloys, and First Article Inspection

Looking for aerospace CNC machining guidance? You are in the right place. This guide answers the key questions for engineers.

The Regulatory Environment — aerospace CNC machining

Aerospace manufacturing is governed by AS9100 Rev D — the industry quality management standard that extends ISO 9001 with aviation-specific requirements: configuration management, risk management, counterfeit part prevention. first article inspection (FAI) per AS9102. Parts for defense applications may also fall under ITAR (International Traffic in Arms Regulations), which restricts the export of defense-related technical data and hardware.

Common Aerospace Alloys — aerospace CNC machining

Aluminum 7075-T6: High strength-to-weight ratio. Used for aircraft structural skins, wing ribs, fuselage frames. Machines well but is prone to stress corrosion — design with generous radii at stress risers.

Titanium Ti-6Al-4V: Excellent specific strength and corrosion resistance. Standard for structural frames, fasteners, and engine pylons. Difficult to machine — requires rigid setups, sharp tools, and abundant coolant.

Inconel 718: Nickel superalloy for high-temperature applications: turbine discs, combustor liners, exhaust components. Work-hardens rapidly during machining — demands aggressive cutting parameters, frequent tool changes, and careful chip management.

15-5 PH Stainless: Precipitation-hardened stainless for landing gear components, actuator housings. valve bodies where high strength and corrosion resistance are both needed.

First Article Inspection (FAI) per AS9102 — aerospace CNC machining

FAI is a documented verification that a production process — machines, materials, fixtures, programs — can consistently produce a conforming part. It consists of three forms: Form 1 (Design Documentation Review), Form 2 (Product Accountability). Form 3 (Characteristic Accountability — every dimension on the drawing measured and recorded). FAI is required for new parts, new suppliers, design changes, and process changes.

Tolerance Stack-Up in Assemblies — aerospace CNC machining

Aerospace assemblies involve many mating parts, each with its own tolerance. Tolerance stack-up analysis (worst-case or statistical) ensures the assembly remains within functional limits even when all parts are at their extreme tolerances. Critical dimensions on individual parts are often tightened to accommodate stack-up. Share your assembly model with Ginwate CNC so engineers can advise on where tolerance tightening adds real value.

What to Look for in an Aerospace Supplier — aerospace CNC machining

• AS9100 certification (verify the scope includes your part category)
• CMM inspection capability with calibrated equipment
• Material traceability to mill certificate and heat lot
• FAI capability and experience
• Documented NCR (non-conformance) process
• Willingness to share process FMEA and control plans

Related Ginwate Resources

• Aerospace Manufacturing Solutions
• 5-Axis Machining — for complex aerospace geometry
• Titanium Ti-6Al-4V Machining
• Aluminum 7075-T6 Aerospace Grade
• Aerospace Case Studies — Tier 1 OEM projects we've shipped
• ITAR-aware Handling & NDA Process

References: ISO 2768 General Tolerances and CNC on Wikipedia.

FAQs about aerospace CNC machining

Is aerospace CNC machining right for every project?

No. aerospace CNC machining fits some jobs better than others. We help you pick the right spec for your part. Tell us your load, heat, and budget, and we will steer you to the best choice. Most clients save money by picking the right grade up front, not the most premium one.

How fast can Ginwate ship aerospace CNC machining parts?

For most aerospace CNC machining jobs we quote in four hours. Lead time runs five to ten days for prototypes. Production runs land in two to three weeks. Rush jobs ship in 72 hours when stock is on hand. Send your CAD file to start.

What tolerances can you hold for aerospace CNC machining?

Most aerospace CNC machining parts hold plus or minus 0.02 mm without trouble. Tighter tols are possible with the right fixturing and a final grind pass. We hit ISO 2768-fH on first try for the bulk of jobs. Spec the tols you need, not tighter than that.

Do you offer DFM review for aerospace CNC machining?

Yes. Every quote includes a free DFM review by a senior engineer. We flag hard features, costly tols, and cheaper paths. This pays back fast — most parts get five to twenty percent cheaper after the review. No fee for this service.

Key Takeaways on aerospace CNC machining

The right plastic or metal pick saves time and money. aerospace CNC machining is one piece of the puzzle. Match the spec to the load, heat, and chemicals your part will see. Pick simple geometry where you can. Spec tight tols only where they matter. We are here to help at every step.

Ginwate has shipped aerospace CNC machining parts for hundreds of clients. We work with start-ups and Fortune 500 teams. Our shop runs eight CNC mills and four lathes. We hit lead times of five to ten days for most jobs. Quality is checked at every stage. We back our work with a full quality report.

Want to learn more about aerospace CNC machining? Browse our other guides above. Or send your part files for a free quote. We will get back to you in four hours.