Part-by-Part Breakdown of CNC Machining in Medical vs. Aerospace Applications
CNC machining is vital to both medical and aerospace industries, but the part requirements, tolerances, and materials differ significantly.
This guide compares machined components from both sectors—by function, precision level, and material usage.
CNC Machining in the Medical Industry
Medical components demand tight tolerances, biocompatible materials, and smooth, sterile finishes.
CNC-machined medical parts:
| Part Name | Primary Function | Material Used | Typical Tolerance |
|---|---|---|---|
| Orthopedic Implants | Joint and bone replacement | Titanium, PEEK | ±0.001–0.005 mm |
| Surgical Instruments | Cutting, holding, clamping | Stainless Steel | ±0.01 mm |
| Dental Abutments | Prosthetic support structures | Titanium, Zirconia | ±0.005 mm |
| Spinal Cages | Support vertebral fusion | PEEK, Titanium | ±0.002 mm |
| Device Housings | Protect diagnostic or therapeutic systems | Polycarbonate, Aluminum | ±0.05 mm |
Key requirement: Biocompatibility, sterilizability, and consistent repeatability in small production runs.
CNC Machining in the Aerospace Industry
Aerospace parts require precision under mechanical stress, high temperatures, and corrosive conditions.
CNC-machined aerospace parts:
| Part Name | Function in Aircraft/Spacecraft | Material Used | Tolerance Range |
|---|---|---|---|
| Turbine Blades | Manage airflow and propulsion | Inconel, Titanium | ±0.002 mm |
| Wing Brackets | Structural reinforcement | Aluminum, Titanium | ±0.01 mm |
| Avionics Housings | Protect electronic systems | Aluminum, Magnesium | ±0.005 mm |
| Engine Casings | Align and encase powertrain systems | Stainless Steel, Alloys | ±0.005 mm |
| Antenna Mounts | Secure radar and signal components | Composites, Aluminum | ±0.01 mm |
Key requirement: High fatigue strength, dimensional accuracy, and thermal resistance in mid-to-high production volumes.
Material Comparison: Medical vs. Aerospace
| Industry | Common Metals | Plastics & Composites |
|---|---|---|
| Medical | Titanium, Stainless Steel | PEEK, PTFE, Polycarbonate |
| Aerospace | Inconel, Aluminum, Titanium | CFRP, epoxy resins |
Both sectors benefit from tight-tolerance CNC machining services for functional, load-bearing, and safety-critical parts.
Key Differences in CNC Usage
| Factor | Medical Industry | Aerospace Industry |
|---|---|---|
| Primary Focus | Biocompatibility, hygiene, detail | Structural integrity, performance |
| Volume | Low-to-mid (customized components) | Medium-to-high (fleet components) |
| Surface Finish | Mirror-polished, burr-free | Stress-tested, corrosion-resistant |
| Tolerance Control | Ultra-fine for implants and tools | Precise for aerodynamics and load-bearing |
| Machining Strategy | Multi-tool setups, small batches | Multi-axis, high-speed machining |