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Airframe Fittings Components CNC Machining for Aerospace
Airframe fitting components are precision-machined structural connectors that provide load transfer, articulation capability, and structural joints in aircraft systems including lug fittings, clevis end assemblies, spherical bearing mounts, and pin connection structures. At Zintilon, we specialize in CNC machining of high-strength steel lugs with precision bearing surfaces, titanium lightweight fittings with optimized geometry, aluminum forged fittings with controlled grain flow, and precision hole patterns to achieve exceptional dimensional accuracy, load capacity, and aerospace compliance for critical commercial aircraft, military aircraft, business jets, and helicopter primary structure and flight control applications.
Key Features:
- Precision bearing bore tolerance ±0.025mm with surface finish Ra 0.4-0.8μm for pin connections
- Aerospace-grade materials: steel 4340, 300M, titanium Ti-6Al-4V, aluminum 2024-T3, 7075-T6
- Ultimate load capacity 5,000-500,000 N with safety factors 1.5-2.5 meeting structural design requirements
- Dimensional accuracy ±0.035mm maintaining proper load alignment and articulation angles ±30 degrees
- AS9100D certified manufacturing with full traceability, proof load testing, and flight qualification support
Trusted by 15,000+ businesses
Why Top Aerospace Manufacturers
Trust Zintilon
Increased Productivity
Engineers get time back by not dealing with immature supply chains or lack of supply chain staffing in their company and get parts fast.
10x Tighter Tolerances
Zintilon can machine parts with tolerances as tight as+/ - 0.0001 in -10x greater precision compared to other leading services.
World Class Quality
Zintilon provides aerospace parts for leading aerospace enterprises, verified to be compliant with ISO9001 quality standard by a certified registrar. Also, our network includes AS9100 certified manufacturing partners, as needed.
Premium Aerospace Alloys
2024-T3, 6061-T6, 7075-T6 aluminum optimized for your specific application
Advanced Multi-Axis Machining
3-axis and 5-axis CNC for I-beams, C-channels, tapered spars, and complex geometries
Rapid Development Cycles
Prototype to certified production in weeks, not months
Aerospace-Grade Surface Treatments
Anodizing Type II/III, passivation, polishing, shot peening, and custom coatings
AS9100D Quality Certification
Complete traceability and documentation for regulatory compliance
Flexible Production Scaling
Single prototypes to 10,000+ unit production runs with consistent quality
From Prototyping to Mass Production
Zintilon is certified for the AS9100D aerospace quality management standard and supplies engineered components to commercial aircraft manufacturers, military aircraft OEMs, business aviation producers, and aircraft structural system integrators worldwide.
Prototype Airframe Fitting Components
Get high-precision prototypes of airframe fitting assemblies that mimic your final design. Verify load capacity, evaluate bearing surface quality, test articulation performance, and confirm dimensional accuracy before full-scale aircraft production.
Key Points:
Key Points:
- Rapid prototyping with structural testing validation
- Tight tolerances (±0.025mm for bearing bores)
- Test ultimate loads, fatigue life, and compliance early
EVT – Engineering Validation Test
Airframe fitting component configuration must meet all dimensional accuracy, load capacity, and bearing surface requirements for prototype construction. Identify stress concentration and bearing wear issues early to ensure reliable structural performance, as prototype parts are adjusted for lug geometry and hole specifications.
Key Points:
Key Points:
- Validate prototype functionality with proof load testing
- Rapid design iterations for weight optimization
- Ensure readiness for production with bearing fit validation
DVT – Design Validation Test
Use different materials and forging processes to analyze airframe fitting component performance for ultimate load capacity and fatigue resistance. This is to assess the aircraft structural system performance to achieve desired reliability and certification standards before production.
Key Points:
Key Points:
- Confirm design integrity and load specifications
- Test multiple alloys and heat treat configurations
- Ensure production-ready performance with fatigue testing
PVT – Production Validation Test
Assess large-scale production capabilities for airframe fitting components and evaluate production consistency challenges before initiating full production to address bore tolerance uniformity and dimensional accuracy gaps in the manufacturing process flow.
Key Points:
Key Points:
- Test large-scale production capability with coordinate measurement
- Detect and fix process issues early in precision boring
- Ensure consistent part quality and structural integrity
Mass Production
Efficiently manufacture high-quality flight-critical airframe fitting components, guaranteeing dependable aircraft structural performance and punctual delivery to aircraft manufacturers and structural suppliers.
Key Points:
Key Points:
- Consistent, high-volume production with AS9100D compliance
- Precision machining for flight-critical quality standards
- Fast turnaround with strict quality control and FAA/EASA certification support
Simplified Sourcing for
the Aerospace Industry
Our aviation industry parts manufacturing capabilities have been verified by many listed companies. We provide a variety of manufacturing processes and surface treatments for aerospace parts including titanium alloys and aluminum alloys.
Explore Other Aerospace Components
Discover our full range of precision CNC machined aerospace parts, designed for strength, durability, and exact fit. Explore components for engines, fuselage, tail sections, landing gear, and more to meet every aircraft manufacturing need.
Aerospace Industry, Airframe Fitting Components, Machining Capabilities
We deliver precision CNC machining for airframe fittings using multi-axis machining centers, precision boring, and grinding. Our capabilities include precision boring for bearing bores achieving ±0.025mm tolerance with Ra 0.4-0.8μm surface finish for pin connections supporting loads 5,000-500,000 N, precision milling for lug profiles with dimensional accuracy ±0.035mm, precision drilling for attachment holes with positional accuracy ±0.040mm per MS/AN standards, precision grinding for critical bearing surfaces, precision machining for bushing installation features with tolerance ±0.020mm, and stress-relief features per design requirements. We machine steel 4340 high-strength lugs with tensile strength 1,520-1,930 MPa, 300M steel for ultra-high-strength applications with tensile strength 1,930-2,070 MPa, titanium Ti-6Al-4V lightweight fittings reducing weight 40-45% versus steel, aluminum 2024-T3 and 7075-T6 forged fittings, and stainless steel 17-4PH. Comprehensive testing includes proof load testing to 150% ultimate loads, bearing stress validation, dimensional verification, and fatigue testing ensuring 20,000-60,000 flight hours service life with FAA/EASA compliance.
Aerospace
Materials & Finishes
Materials
We provide a wide range of materials, including metals, plastics, and composites.
Finishes
We offer superior surface finishes that enhance part durability and aesthetics for applications requiring smooth or textured surfaces.
Specialist Industries
you are welcome to emphasize it in the drawings or communicate with the sales.
Materials for Airframe Fitting Components
Our CNC machine shop uses and offers for airframe fitting components 12+ aerospace-grade high-strength steels, titanium alloys, and aluminum alloys to support rapid prototyping, precision aircraft manufacturing, and to maintain quality to AS9100D, FAA, EASA, and military airframe specifications.
High machinability and ductility. Aluminum alloys have good strength-to-weight ratio, high thermal and electrical conductivity, low density and natural corrosion resistance.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.003 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Titanium is an advanced material with excellent corrosion resistance, biocompatibility, and strength-to-weight characteristics. This unique range of properties makes it an ideal choice for many of the engineering challenges faced by the medical, energy, chemical processing, and aerospace industries.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Stainless steel alloys have high strength, ductility, wear and corrosion resistance. They can be easily welded, machined and polished. The hardness and the cost of stainless steel is higher than that of aluminum alloy.
Price
$ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Steel is a strong, versatile, and durable alloy of iron and carbon. Steel is strong and durable. High tensile strength, corrosion resistance heat and fire resistance, easily molded and formed. Its applications range from construction materials and structural components to automotive and aerospace components.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.001 mm (routing)
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Highly resistant to seawater corrosion. The material’s mechanical properties are inferior to many other machinable metals, making it best for low-stress components produced by CNC machining.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Brass is mechanically stronger and lower-friction metal properties make CNC machining brass ideal for mechanical applications that also require corrosion resistance such as those encountered in the marine industry.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Few metals have the electric conductivity that copper has when it comes to CNC milling materials. The material’s high corrosion resistance aids in preventing rust, and its thermal conductivity features facilitate CNC machining shaping.
Price
$$$
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Due to the low mechanical strength of pure magnesium, magnesium alloys are mainly used. Magnesium alloy has low density but high strength and good rigidity. Good toughness and strong shock absorption. Low heat capacity, fast solidification speed, and good die-casting performance.
Price
$ $ $ $
Lead Time
< 7 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Iron is an indispensable metal in the industrial sector. Iron is alloyed with a small amount of carbon – steel, which is not easily demagnetized after magnetization and is an excellent hard magnetic material, as well as an important industrial material, and is also used as the main raw material for artificial magnetism.
Price
$ $ $ $ $
Lead Time
< 10 days
Tolerances
Down to ±0.005 mm
Max part size
3000*2200*1100 mm
Min part size
2*2*2 mm
Let’s Build Something Great, Together
FAQs: Airframe Fittings Components CNC Machining for Aerospace Applications
Complementary components in airframe fitting are steel 4340 or 300M lug fittings with a bearing bore tolerance of 0.025mm and a Ra of 0.4-0.8mu finish that carry ultimate loads of 5,000-500,000 N in tension, compression, or shear with a bearing stress of 600-1200 Mpa, titanium Ti-6Al-4V clevis end assemblies with dimensional performance of 0.035mm, pin connection holes Components satisfy safety factors of 1.5-2.5 and meet the FAA FAR Part 25 and EASA CS-25 structural requirements of primary and secondary structures.
Steel 4340 provides exceptional tensile strength 1,520-1,930 MPa (heat treated to 280-320 HBN) for lug fittings supporting ultimate loads 7,500-750,000 N (1.5 safety factor on 5,000-500,000 N limit loads) with excellent fatigue resistance supporting 20,000-60,000 flight hours with spectrum loading, good machinability achieving ±0.025mm bearing bore tolerance and a 0.4-0.8μm finish, toughness preventing brittle fracture with fracture toughness 50-60 MPa√m, and proven aerospace heritage in landing gear, wing attachment, and flight control fittings. Titanium Ti-6Al-4V offers superior specific strength 300 kN·m/kg for lightweight fittings reducing weight 40-45% versus steel enabling structural efficiency critical for wing root joints and tail attachments, tensile strength 900 MPa supporting loads 7,500-300,000 N, excellent fatigue resistance and damage tolerance, low thermal expansion 8.6 µm/m·K maintaining ±0.035mm dimensional accuracy across -55°C to +200°C, corrosion resistance eliminating protective coatings, and compatibility with composite structures. 300M steel delivers ultra-high tensile strength 1,930-2,070 MPa for weight-critical primary fittings, superior fracture toughness 90 MPa√m, excellent fatigue properties, and enhanced stress corrosion cracking resistance.
Precision boring creates bearing bores with ±0.025mm tolerance and Ra 0.4-0.8μm finish for pin connections. Precision grinding creates critical bearing surfaces with ±0.020mm tolerance. Precision milling creates lug profiles with ±0.035mm dimensional accuracy. Precision drilling creates attachment and pin holes with ±0.040mm positional accuracy per MS/AN standards. Reaming achieves final bore dimensions and surface finish. Countersinking and spot facing create fastener interfaces per NASM specifications. Precision machining maintains edge distances 2.0-3.0× hole diameter per NASM33781. EDM creates stress-relief undercuts and radii. Heat treatment includes quench and temper for 4340 steel (280-320 HBN) and 300M steel (50-54 HRC), solution treatment and aging for titanium, solution treatment for 2024 aluminum (T3 temper). Surface treatments include cadmium plating per AMS 2400, shot peening per AMS 2430 for fatigue enhancement inducing compressive residual stress -400 to -600 MPa, anodizing per MIL-A-8625 for aluminum, and dry film lubricants on bearing surfaces.
We maintain bearing bore tolerance ±0.025mm with Ra 0.4-0.8μm finish ensuring proper pin fit (clearance 0.025-0.075mm) and bearing stress distribution 600-1,200 MPa supporting ultimate loads 5,000-500,000 N, dimensional accuracy ±0.035mm across fitting envelope maintaining proper load alignment and articulation capability ±30 degrees, pin hole positional accuracy ±0.040mm per MS/AN standards with diameter tolerance ±0.025mm (6-50mm holes), bushing installation tolerance ±0.020mm ensuring interference fit 0.025-0.075mm preventing bushing rotation, edge distance tolerance ±0.10mm maintaining 2.0-3.0× hole diameter per NASM33781 preventing edge tearout under ultimate loads, perpendicularity ±0.030mm for bearing faces, concentricity 0.030mm between bearing bores for clevis fittings, straightness specifications, and dimensional stability through thermal cycling -55°C to +200°C. These tolerances support tension/compression/shear loads 5,000-500,000 N, bearing stress 600-1,200 MPa, articulation angles ±30 degrees, safety factors 1.5-2.5, fatigue life 20,000-60,000 flight hours, and FAA FAR Part 25 and EASA CS-25 compliance.
Yes, we provide comprehensive prototyping with CMM inspection (±0.005mm accuracy) validating all critical dimensions and GD&T requirements, bearing bore measurement using precision bore gauges and air gauging (±0.002mm resolution) verifying ±0.025mm tolerance, surface finish measurement using profilometers verifying Ra 0.4-0.8μm on bearing surfaces, pin hole positional measurement validating ±0.040mm accuracy per MS/AN standards, edge distance measurement validating 2.0-3.0× hole diameter compliance per NASM33781, bushing fit measurement validating ±0.020mm tolerance and interference fit 0.025-0.075mm, material verification per AMS specifications (4340 per AMS 6414, 300M per AMS 6417, Ti-6Al-4V per AMS 4928, 2024 per AMS 4037, 7075 per AMS 4123) with complete heat lot traceability and charpy impact testing, comprehensive NDT including magnetic particle inspection per AMS 3041/3042 for steel detecting surface/subsurface cracks, fluorescent penetrant inspection per AMS 2644 for titanium and aluminum, ultrasonic inspection for forging quality, proof load testing to 150% ultimate loads (7,500-750,000 N) validating structural integrity with strain gauge monitoring measuring stress distribution and permanent deformation <0.2% confirming elastic behavior, bearing stress testing validating 600-1,200 MPa capacity with pin pull-through and bearing deformation limits, articulation testing validating ±30 degrees capability with friction torque measurement, fatigue testing simulating 20,000-60,000 flight hours with spectrum loading per ASTM E466 and MIL-STD-1530C measuring crack initiation and propagation, fracture mechanics testing measuring KIC fracture toughness 50-90 MPa√m and J-integral, environmental testing including salt spray corrosion per ASTM B117, stress corrosion cracking testing per ASTM G47, hydrogen embrittlement testing per ASTM F1624, dimensional stability testing through thermal cycling -55°C to +200°C over 100+ cycles, and full aircraft structural testing validating load paths and joint interactions. We support low-volume production (50-500 fittings annually) for business jets, regional aircraft, and military platforms, and high-volume manufacturing (thousands) for commercial aircraft programs with complete material traceability including forging certifications and heat treatment documentation per AMS 2759, first article inspection per AS9102 with detailed dimensional reports and bearing stress calculations, structural substantiation documentation supporting DER/DAR approval, and AS9100D quality compliance supporting FAA FAR Part 25, EASA CS-25.
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