Cleanroom linear axes (ISO 14644) - Design considerations

A practical overview of how cleanroom classification, contamination control and mechanical design principles influence the specification of linear motion systems for controlled environments.

Why cleanroom classification matters in linear motion design
In cleanroom environments, airborne particles, outgassing and surface contamination can all compromise product quality, yield and regulatory compliance. Linear motion systems used in these spaces must therefore be cleanroom‑compatible by design, not only for precision and reliability, but also to minimise particulate generation and support controlled airflow conditions

This is especially critical in industries such as semiconductor manufacturing, pharmaceuticals and precision assembly, where cleanroom standards are defined and monitored under ISO classification frameworks.

This article outlines the key considerations when selecting cleanroom compatible linear axes, with a focus on ISO 14644 cleanroom classes, mechanical design choices and certification principles.