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High-Precision Aerospace CNC Machining Services

· AS9100-aligned manufacturing for flight-critical parts

· Tolerances to+0.005 mm.

· Titanium, Inconel, aluminum alloys and more

· From prototype to production

±0.005mm

5-Axis

AS9100

FAI

Achievable tolerance
Multi-axis capability
Quality standard
First article inspection
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The aerospace industry is advancing at a rapid pace, with CNC machining serving as a vital tool in driving its sustained growth. Aerospace CNC machining manufacturing relies on precise programming and the careful movement of cutting tools. Using specialised tools and optimised cutting parameters, CNC machining for aerospace can produce parts that meet the high-precision requirements.
 
Through this article, you will learn:
  • Characteristics and applications of CNC machining in the aerospace field
  • Machine tools and materials commonly used for aerospace CNC machining
  • Tolerance requirements and standards for CNC aerospace machining
  • Real-world case study of aerospace parts CNC machining

Why CNC Machining Is Essential for Aerospace Parts Manufacturing

Compared to other industries, aerospace components have several unique features that influence the development of machining aerospace components. These main characteristics are in the following areas:
  • Product types are complex, small batches and high diversity
  • Structures are becoming increasingly complex and integrated
  • Prominent thin-walled and large-scale characteristics make deformation control critical
  • High material removal rates mean that machining efficiency is a critical issue
  • Stringent quality control requirements
  • Diverse materials

Key Machines for Aerospace CNC Machining

cnc mill
3-Axis CNC Milling Machine
  • Tolerance range: ±0.005″ to ±0.001″ (±0.127 to ±0.025 mm)
  • Uses: Machining flat surfaces, brackets, mounting plates, structural support parts
    Capabilities→
4 axis
4-Axis CNC Milling Machine
  • Tolerance range: ±0.001″ to ±0.0005″(±0.025 to ±0.012 mm)
  • Uses: Producing curved features, turbine blade fixtures, manifolds, engine block faces.
     
    Capabilities→
5-axis（JDCNC） JDGR200
5-Axis CNC Milling Machine
  • Tolerance range: ±0.0005″ (±0.012 mm) or tighter
  • Uses: Turbine blades, impellers, blisks, aerodynamic airframe parts, engine casings.
     
    Capabilities→
cnc turning
CNC Turning (Lathe)
  • Tolerance range: ±0.002″ to ±0.0005″ (±0.05 to ±0.012 mm)
  • Uses: Hydraulic fittings, landing gear pins, shafts, sleeves, and bearings
    Capabilities→
Overhead view inside a clean, complex CNC machine tool block featuring multiple drill bits, spindles, and a linear guide rail.
Swiss-Type CNC Lathe
  • Tolerance range: ±0.0002″ (±0.005 mm)
  • Uses: Miniature fasteners, bushings, sensor housings, precision aerospace instrumentation components.
     
    Capabilities→
5-axis（JDCNC） JDGR200
CNC Grinding Machine
  • Tolerance range: ±0.0001″ (±0.0025 mm)
  • Uses: Finishing bearing races, rotor shafts, critical engine components requiring ultra-smooth tolerances.
     
    Capabilities→
CNC EDM
  • Tolerance range: ±0.0001″ (±0.0025 mm)
  • Uses: Complex cavities, cooling channels, fuel injector nozzles, hard superalloys like Inconel & Titanium.
    Capabilities→
Laser Cutting
  • Tolerance range: ±0.002″ to ±0.004″ (±0.05 to ±0.1 mm)
  • Uses: Cutting thin sheet metals for aircraft skins, brackets, shrouds, and precision panel components with clean edges
Waterjet Cutting
  • Tolerance range: ±0.003″ to ±0.010″ (±0.08 to ±0.25 mm)
  • Uses: Cutting composites, titanium, aluminum, and heat-sensitive materials without thermal distortion
     
    Capabilities→

CNC Aerospace Parts We Offer

Aerospace CNC machining ensures the precision, dependability, and quality required for components that are essential for flying, from simple shapes to the edges of turbines. The following are some of the most popular CNC-precision aircraft parts:

Fuselage Frames & Bulkheads
These are important components that must be manufactured with extreme precision to withstand air pressure, including the wing’s frame and wing ribs.
Engine Mounts & Housings
The major components of a vehicle are held in place by motor mounts and supports, which must be sturdy enough to withstand high temperatures and shaking.
Turbine Blades & Rotors
Because turbine blades and rotors are subjected to extremely high temperatures and pressures, they require precise finishes and measurements.
Avionics Enclosures
Creating secure areas for equipment on airplanes and making sure that everything is positioned safely.
Interior Seat Frames
The internal components are shaped and supported to assist in reducing weight and increasing quality.
Fuel System Valves
Fuel framework valves and fittings control fuel flow and pressure; they require robust seals that function effectively under various conditions.
Custom Fasteners
Like pins and clamps, custom aviation latches hold everything together.

Materials Used in Aerospace CNC Machining

Aerospace components must handle extreme stress, high heat, corrosion, and vibration while staying lightweight. Because of this, you work with materials that offer high strength-to-weight ratios, thermal stability, and fatigue resistance.  

Aluminum Alloys (6061, 7075)

Lightweight, corrosion-resistant, easy to machine

Stainless Steel (17-4 PH, 316)

High strength, heat resistant, fatigue resistant

Superalloys (Inconel, Hastelloy)

Maintains strength at extreme temperatures

Tool Steel (A2, D2, H13)

Wear-resistant, very strong

Magnesium Alloys

Very lightweight, good machinability

Plastics (PEEK, Ultem, Nylon, PTFE, Delrin)

Lightweight, impact-resistant, heat-stable, low friction

Precision Requirements We Meet

Feature Type Typical Tolerance Surface Roughness
Structural ribs, brackets, frames ±0.02 – 0.05 mm Ra 1.6 – 3.2 μm
Engine nacelle housings & mounts ±0.01 – 0.03 mm Ra 0.8 μm
Rotating components (turbine disks) ±0.005 – 0.01 mm Ra 0.4 μm
Fit features: holes, bearing seats H7/H6 or ±0.005 mm Ra 0.8 μm
Sealing & sliding surfaces ±0.003 – 0.005 mm Ra 0.2 μm
AS9100 / AS9110 / AS9120
AS9102（First Article Inspection）
ASME Y14.5 (GD&T Standard)
Nondestructive Test
NAS, AMS, ASTM (Materials and Process Standards)

Case Study: 3D Lightweight Support Ribs for Titanium Alloy Wing Boxes

Research Subject: A topologically optimised internal wing spar with dimensions of 420 × 180 × 32 mm.
Features: multiple deep cavities, thin-walled sections and three-dimensional curved surfaces.

Ti-6Al-4V plate forging | AS9100 / AS9102 certification required

±0.02 mm
Dimensional accuracy
1.5 mm
Minimum wall thickness
Passed 1st
FAI attempt
Challenge Engineering Solution Outcome
Thin-wall deformation & chatter Back-to-back symmetrical finishing, anti-vibration toolholders, light-cut strategy Wall deviation: 0.12 → 0.02 mm
Tool chipping from Ti-6Al-4V heat 70-bar coolant, TiAlN-coated 3-flute tools, optimised spindle speed & feed rate Tool life improved 2.2×
Deep pocket toolpath interference Full 5-axis CAM simulation, ball-nose + climb milling, 18° tilt to clear pockets Zero interference, all pockets machined
Post-machining distortion (0.25 mm) Two-stage roughing + intermediate stress-relief heat treatment, flexible fixturing Warp reduced: 0.25 → 0.05 mm
AS9102 documentation & FAI Full CMM scanning, tool-life tracking, complete FAI documentation package Passed FAI on first attempt

Choose FS Fab for CNC Aerospace Machining

CMM dimensional verification

Every critical feature measured and reported. Full deviation maps provided for complex aerospace geometry.

Material traceability

Full material certifications per NAS and AMS standards, supplied with every aerospace shipment.

Multi-axis, single setup

5-axis capability reduces fixturing steps, maintaining positional accuracy that re-setup workflows can't match.

Fast turnaround on complex parts

DFM review + optimised CAM strategy means no surprises mid-production and reliable lead times.

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