BRIGHTSTAR
PROTOTYPE CNC CO., LTD
+86 137 5010 5351
EN
April. 14, 2026
In the aerospace industry, failure is not an option. A single component failure at 35,000 feet can have catastrophic consequences. This is why aerospace CNC machining operates under the most demanding quality standards of any manufacturing sector. From turbine blades to structural brackets, every part must withstand extreme temperatures, vibration, pressure differentials, and corrosion while maintaining absolute reliability for decades.
At Brightstar, we specialize in aerospace CNC machining that complies with AS9100, NADCAP, and customer-specific requirements. This comprehensive guide explains the rigorous standards, approved materials, certification processes, and best practices that define aerospace component manufacturing.
While precision CNC machining for automotive or medical devices requires high accuracy, aerospace CNC machining adds layers of regulatory oversight, material traceability, and process validation that go far beyond typical manufacturing.
Key differentiators include:
· Zero-defect tolerance: Unlike consumer goods where a 1% defect rate may be acceptable, aerospace demands 100% conformance.
· Extreme operating conditions: Parts must function reliably from -65°C to over 1,000°C.
· Decades-long service life: Aerospace components are expected to last 20–30 years without failure.
· Extensive documentation: Every batch requires complete traceability from raw material to final inspection.
· Third-party certifications: AS9100, NADCAP, and customer source inspections are mandatory.
Aerospace CNC machining is not just about making parts—it's about proving that each part meets every requirement, every time.
To supply CNC machined components to aircraft OEMs (Boeing, Airbus, Lockheed Martin) or tier-1 suppliers, a machine shop must comply with several critical standards.
AS9100D is the internationally recognized quality management system standard specifically for aerospace. It builds upon ISO 9001:2015 with additional requirements for:
· Risk management and prevention of non-conformities
· Configuration management
· Product safety and reliability
· Counterfeit parts prevention
· Regulatory compliance (FAA, EASA)
At Brightstar, our aerospace CNC machining processes are fully AS9100D certified, ensuring compliance with prime contractor requirements.
NADCAP is a specialized accreditation program for aerospace special processes. For CNC machining, NADCAP covers:
· Conventional machining (milling, turning, grinding)
· Non-conventional machining (EDM, laser cutting)
· Surface enhancement and finishing
Many aerospace primes require NADCAP accreditation for critical processes. Brightstar maintains NADCAP certification for key aerospace CNC machining operations.
Major aerospace OEMs impose their own requirements:
· Boeing: BAC (Boeing Approved Commodities) specifications
· Airbus: ABD (Airbus Directives) and AIPS (Airbus Industrial Process Standards)
· Lockheed Martin: LMC Quality Clause Q-01
We are experienced in interpreting and complying with these customer-specific standards.
For parts that will be installed on certified aircraft, compliance with 14 CFR Part 21 (FAA) or EASA Part 21 is required. This includes:
· Production approval (FAA PMA or EASA POA)
· Conformity inspection
· Airworthiness release documentation
Material selection for aerospace CNC machining is governed by strict specifications. Only certified materials with verifiable mill certificates are acceptable.
Aluminum is widely used for airframe structures due to its excellent strength-to-weight ratio.
· 7075-T6 / T7351: High-strength alloy for wing spars and fuselage frames
· 2024-T3 / T351: Good fatigue resistance for structural components
· 6061-T6: General-purpose alloy for brackets and fittings
· 7050: Improved stress corrosion resistance for thick sections
CNC considerations: Aluminum is easy to machine but requires high spindle speeds and proper chip evacuation to prevent built-up edge.
Titanium is used for high-stress, high-temperature applications where weight is critical.
· Ti-6Al-4V (Grade 5): Most common aerospace titanium for engine components, landing gear, and airframe fasteners
· Ti-6Al-2Sn-4Zr-2Mo: High-temperature alloy for compressor blades and casings
· Ti-10V-2Fe-3Al: High-strength alloy for landing gear structures
CNC considerations: Titanium is difficult to machine. It requires rigid setups, sharp carbide tools, high-pressure coolant (≥1,000 psi), and low cutting speeds to avoid work hardening.
These materials maintain strength at extreme temperatures (up to 1,000°C) and are used primarily in jet engines.
· Inconel 718: Most common superalloy for turbine discs, blades, and casings
· Inconel 625: Excellent corrosion resistance for exhaust systems
· Waspaloy: High-strength alloy for turbine rings and fasteners
· Hastelloy X: Oxidation-resistant for combustion chamber components
CNC considerations: Superalloys are extremely difficult to machine. Tool life can be measured in minutes. Solutions include ceramic or CBN inserts, trochoidal milling, and rigid workholding.
· 15-5PH: Precipitation-hardening stainless for structural fittings and actuators
· 17-4PH: High-strength stainless for landing gear components
· 304 / 316L: Corrosion-resistant alloys for fluid system components
While many composite parts are laid up and cured, CNC machining is used for final trimming, drilling, and edge finishing of carbon fiber reinforced polymer (CFRP) components.
CNC considerations: Composite machining requires diamond-coated tools, dust extraction, and careful feed control to prevent delamination.
Aerospace CNC machining produces hundreds of part types across airframe, engine, landing gear, and systems categories.
· Wing ribs and spars
· Fuselage frames and stringers
· Bulkheads and floor beams
· Control surface hinges (ailerons, elevators, rudders)
· Turbine discs and blades
· Compressor cases and vanes
· Combustion chamber liners
· Fan cases and containment rings
· Main landing gear struts
· Retraction actuators
· Wheel hubs and brake housings
· Lock links and torque links
· Servo valve housings
· Actuator cylinders and pistons
· Control rod ends and bearings
· Manifold blocks
· Fittings and couplings
· Valve bodies and spools
In aerospace CNC machining, quality is not inspected into the part—it is built into the process. However, rigorous inspection remains essential.
FAI is a mandatory requirement for all new or revised aerospace parts, typically performed per AS9102 standard. It involves:
· 100% dimensional inspection of all drawing characteristics
· Material verification against mill certificates
· Process verification (heat treat, coating, etc.)
· Ballooned drawings and inspection reports
Brightstar generates AS9102-compliant FAI packages for every new aerospace part.
Critical features are inspected during machining using:
· In-process probing (on-machine)
· Statistical process control (SPC) for high-volume features
· Operator self-inspection with calibrated gages
Completed parts undergo comprehensive inspection including:
· CMM (Coordinate Measuring Machine) inspection for complex geometries
· Optical measurement for threads, radii, and small features
· Surface finish measurement (profilometer)
· Hardness testing
· Non-destructive testing (NDT) as required (dye penetrant, radiographic, ultrasonic)
Every shipment of aerospace CNC machined components must include:
· Certificate of Conformance (C of C)
· Material test reports (MTRs) with heat numbers
· FAI report (if applicable)
· Special process certifications (anodizing, passivation, NDT)
· Traceability from raw material to finished part
Raw CNC machining is often followed by special processes that require their own NADCAP accreditation.
· Solution treating and aging (aluminum, titanium, superalloys)
· Annealing and stress relieving
· Anodizing (sulfuric, chromic, hard coat) for aluminum
· Passivation for stainless steel
· Chemical milling for weight reduction
· Chrome plating for wear resistance
· Nickel plating for corrosion protection
· Dry film lubricants for threaded fasteners
· Dye penetrant inspection (DPI) for surface cracks
· Radiographic (X-ray) for internal defects
· Ultrasonic for bond integrity and subsurface flaws
Brightstar manages these special processes through approved NADCAP-certified subcontractors, with full traceability and documentation.
Even for experienced shops, aerospace CNC machining presents unique challenges.
Challenge 1: Machining Difficult Superalloys
Inconel 718 and Waspaloy cause rapid tool wear and work hardening.
Solutions:
· Use of ceramic or CBN inserts for roughing
· High-pressure coolant (1,000–2,000 psi) directed at the cutting zone
· Trochoidal or peel milling toolpaths to reduce radial engagement
· Rigid workholding and short tool overhangs
Challenge 2: Thin-Wall Machining
Aerospace parts often have thin walls (1 mm or less) to save weight.
Solutions:
· Use of sacrificial support ribs
· Low radial depth of cut with high axial depth
· Climb milling to reduce cutting forces
· Vacuum fixtures or low-melting-point alloy fixturing
Challenge 3: Deep Hole Drilling
Landing gear components and hydraulic manifolds require deep, precise holes.
Solutions:
· Gun drilling for L/D ratios > 10:1
· Peck drilling cycles with chip breaking
· Through-spindle coolant at high pressure
Challenge 4: Maintaining Traceability
Every raw material lot, every tool used, and every inspection result must be recorded.
Solutions:
· Digital manufacturing execution system (MES)
· Barcode or RFID tracking of work-in-process
· Electronic device history records (eDHR)
Challenge 5: Supply Chain Compliance
Aerospace customers require that all subcontractors (heat treat, coating, NDT) also be NADCAP or AS9100 certified.
Solutions:
· Maintain an approved vendor list (AVL) of certified subcontractors
· Flow down customer requirements to all suppliers
· Perform regular subcontractor audits
At Brightstar, we have built our aerospace capabilities around the principle that quality is never compromised.
· AS9100D certified
· NADCAP accredited for conventional machining
· FAA Repair Station capability (certain part categories)
· Customer-approved supplier for multiple aerospace primes
· 5-axis CNC mills for complex airfoils and contours
· 4-axis CNC lathes with live tooling for mill-turn operations
· High-pressure coolant systems (1,500 psi)
· In-machine probing for adaptive machining
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· Temperature-controlled inspection lab
· CMM with automated programming (PC-DMIS)
· Optical comparator and surface profilometer
· Secure digital documentation system (paperless)
· Machinists trained in aerospace tolerances (tenths)
· Quality engineers experienced with AS9102 FAI
· Programmers skilled in superalloy toolpath optimization
· Full material traceability from mill to finished part
· Electronic batch records with inspection data
· AS9102-compliant FAI packages
· Certificate of Conformance with every shipment
A tier-1 aerospace supplier needed a complex turbine housing made from Inconel 718. Requirements included:
· ±0.005 mm tolerance on critical bore diameters
· Surface finish Ra ≤ 0.4 µm on sealing surfaces
· Full material traceability with MTRs
· NADCAP-accredited machining
· 100% CMM inspection
Brightstar delivered:
· 5-axis CNC milling with trochoidal toolpaths
· High-pressure coolant (1,500 psi) to manage heat
· In-process probing for bore size control
· Complete AS9102 FAI package
· 50 parts delivered in 6 weeks, zero defects
The customer subsequently awarded Brightstar three additional aerospace programs.
The aerospace industry is evolving rapidly. Here are key trends affecting aerospace CNC machining:
Lightweighting and Advanced Materials
The shift to composite-intensive airframes (Boeing 787, Airbus A350) and additive manufacturing will change CNC machining requirements. More titanium and superalloy machining, plus CNC trimming of CFRP.
Digital Thread and Industry 4.0
Full digital traceability from design to delivery, including:
· Model-based definition (MBD) without 2D drawings
· Direct CAM programming from 3D models
· Real-time shop floor data collection
Automation and Lights-Out Machining
Robotic part loading, automated tool changing, and in-machine inspection enable unattended machining of aerospace components.
Hybrid Manufacturing (Additive + Subtractive)
3D printing of near-net shapes followed by CNC finishing reduces material waste for expensive superalloys.
Sustainable Machining
Minimum quantity lubrication (MQL), recycled coolants, and energy-efficient spindles are becoming requirements for aerospace suppliers.
Q1: What is the difference between AS9100 and ISO 9001 for CNC machining?
AS9100 includes all ISO 9001 requirements plus additional aerospace-specific elements: risk management, configuration control, counterfeit parts prevention, product safety, and regulatory compliance. Most aerospace primes require AS9100, not just ISO 9001.
Q2: What tolerances can aerospace CNC machining achieve?
For standard aerospace features, Brightstar maintains ±0.005 mm to ±0.01 mm. For critical features such as bearing journals or valve spools, we can achieve ±0.002 mm with appropriate process controls.
Q3: Is NADCAP required for aerospace CNC machining?
NADCAP is not always mandatory but is increasingly required by primes for critical processes. Many customers accept AS9100 certification alone, but NADCAP provides a competitive advantage. Brightstar maintains NADCAP accreditation for key operations.
Q4: Can you machine Inconel 718 and other superalloys?
Yes. We regularly machine Inconel 718, Inconel 625, Waspaloy, and Hastelloy X using specialized toolpaths, ceramic/CBN tooling, and high-pressure coolant systems.
Q5: What documentation do you provide with aerospace parts?
Each shipment includes a Certificate of Conformance, material test reports (MTRs) with heat numbers, and dimensional inspection reports. For first articles, we provide AS9102-compliant FAI packages.
Q6: Do you offer rapid prototyping for aerospace components?
Yes. We understand that aerospace development cycles require fast iteration. We offer rapid CNC machining for R&D samples with lead times as short as 5 business days.
Q7: What is your minimum order quantity (MOQ) for aerospace parts?
No MOQ. We accept orders from single prototype parts to high-volume production runs. Many aerospace customers start with small lots for testing and qualification.
Q8: How do you ensure part traceability?
Each raw material lot is assigned a unique heat number from the mill certificate. We maintain electronic batch records linking raw material, machining parameters, inspection results, and final part serial numbers.
Q9: Do you perform in-house heat treatment or coating?
We perform some surface treatments (passivation, simple anodizing) in-house. For NADCAP-required special processes (heat treat, chrome plating, NDT), we use approved certified subcontractors with full traceability.
Q10: What file formats do you accept?
We accept STEP (.stp, .step), IGES (.igs), SolidWorks (.sldprt), Parasolid (.x_t), and 2D PDF or DWG drawings. For model-based definition, we can work directly with native CAD files.
Choosing the right partner for aerospace CNC machining means selecting a shop that understands the difference between "good enough" and "airworthy."
Brightstar delivers:
· AS9100D certified quality management system
· NADCAP accredited for conventional machining
· 10+ years of aerospace manufacturing experience
· 5-axis CNC milling and multi-axis turning
· In-house CMM inspection with full documentation
· Complete traceability from raw material to finished part
· Fast quoting within 24 hours
· Rapid prototyping and production scaling
We don't just machine parts. We provide confidence that every component will perform flawlessly in the most demanding environment on Earth—or above it.
Ready to Discuss Your Aerospace CNC Machining Project?
Whether you need turbine engine components, structural airframe parts, or landing gear assemblies, Brightstar has the certifications, equipment, and experience to deliver.
Email Amy: amy@brightstarprototype.com
Call or WhatsApp: +86 13750105351
Send us your CAD files and specifications for a free technical review and quote within 24 hours. Let us help you meet the strictest standards in aerospace.
Brightstar – Aerospace CNC Machining. Certified. Precise. Airworthy.
