Complete Guide to Choosing the Right Laser Nozzle

The nozzle governs gas flow, edge quality, and pierce stability. A poor match causes dross, burrs, and extra cleanup.

Match nozzle diameter to kerf and assist-gas pressure. Smaller orifices improve edge finish; larger ones support higher speeds and thick plates.

For mild steel with oxygen, favor smaller diameters for cleaner edges; for stainless/aluminum with nitrogen, larger orifices help evacuation at high speed.

Double-nozzle designs improve cooling and coaxial flow in high-power jobs; single-nozzle is often enough for thin sheets and prototypes.

Keep the nozzle face clean and flat; even micro-dents disturb gas symmetry.

Recalibrate stand-off after any nozzle change and verify focus height with a feeler gauge or auto-height check.

Inspect the nozzle orifice under magnification weekly to detect wear or damage early.

Avoid over-tightening, which can warp the nozzle seating surface and misalign the gas jet.

If you see excessive dross, check for nozzle damage, debris inside the orifice, or incorrect stand-off height.

For inconsistent pierces, ensure the nozzle is centered over the beam path and replace any warped or burned tips.