Why are aerospace standards so strict?

Components used in aviation operate under extreme conditions rarely found in any other industry:
very low temperatures at high altitudes, significant loads, vibrations, pressure fluctuations and the highest safety requirements — where the margin for error is virtually zero.

This means that every element — even the smallest insert, bracket or bushing — must meet a set of highly restrictive material, quality and process standards.
In practice, reliability and repeatability are the foundation of production, and the CNC machining process must follow strict technological controls.

Key standards used in aerospace component manufacturing

1. Quality and system standards — AS9100 / EN9100

These standards define the requirements for quality management systems in the aerospace industry. They include documentation and traceability control, process validation, supplier qualification, and product safety and risk management.
Meeting AS9100/EN9100 requirements is essential for entering the global aerospace supply chain.

2. Material standards — AMS (Aerospace Material Specifications)

Materials used in aerospace must be certified in accordance with AMS, especially:
• aluminium alloys from the 2xxx, 6xxx and 7xxx series,
• high-temperature superalloys (e.g., Inconel, Hastelloy),
• titanium alloys such as Ti6Al4V,
• stainless and high-strength steels.

3. Machining and process standards

Examples of the most important specifications:
• AMS 2750 – temperature control in heat-treating processes,
• AMS 2420 / 2468 / 2404 – galvanic and chemical coatings,
• ISO 2768 / ISO 286 / ISO 1101 – geometric and dimensional tolerances,
• OEM standards (Airbus, Safran, Collins, Pratt & Whitney).

Every manufacturing step must be monitored and documented — including setups, in-process checks, CMM measurements and FAI reports.

4. Quality control – FAI, PPAP, CMM

Aerospace quality control requires full documentation confirming dimensional conformity.
Every drawing dimension must be measured and recorded according to traceability rules.

Why is precision CNC machining so important?

Critical factors include not only dimensional tolerances but also:
• process repeatability,
• tool stability and vibration control,
• optimal cutting strategies,
• required surface geometry (roughness, waviness),
• absence of residual stresses.

Even a small deviation in mass or geometry can cause imbalance in rotating assemblies. In aerospace components, hundredths or even thousandths of a millimetre can determine operational safety, which is why such precision is mandatory.

How does aerospace manufacturing look in practice?

A reliable manufacturer must ensure:
• material verification before machining,
• geometry checks at every stage,
• full traceability of tools and parameters,
• final CMM inspection,
• secure archiving of all measurement results and documentation.

Top quality comes not only from CNC technology, but also from the team’s experience and robust quality procedures.

Summary

To be approved for aerospace use, a component must meet strict standards for:
• materials,
• machining processes,
• tolerances and geometry,
• quality control,
• documentation and traceability.