How To Choose The Right Fibre Laser Nozzle

14 Nov How To Choose The Right Fibre Laser Nozzle

When people talk about fibre laser cutting, they usually focus on power, speed, or assist gas. But one of the smallest parts of your setup — the nozzle — plays a huge role in how your metal cutting results turn out.

As an authorised Bodor UK partner, we spend a lot of time helping customers get the best performance from the range of Bodor fibre laser cutting machines.

Understanding how nozzles work (and when to replace them) can make all the difference to your cut quality, efficiency, and machine reliability.

1. What Is a Laser Cutting Nozzle?

In simple terms, the nozzle is the small copper tip at the end of your cutting head. It might not look like much, but it directs the assist gas, protects your optics, and has a major influence on your overall cutting performance.

It’s one of the most important consumables on any fibre laser metal cutting machine — keeping your gas flow clean and your optics safe from molten debris.

Main Types

• Single-layer nozzles – A single gas channel isolates the cutting area from the surrounding air. Ideal for smooth, simple gas flow.
• Double-layer nozzles – An inner and outer channel give better gas control and laser stability, which helps produce consistent results on demanding metal cutting jobs.

Why It Matters

• Protects your optics – Stops spatter and dust from damaging the lens.
• Improves gas focus – Delivers concentrated airflow for cleaner edges and smoother cuts.

2. Choosing the Right Nozzle for Your Bodor Fibre Laser

Different machines and materials need different nozzles. Designs and tolerances vary, so always use genuine Bodor nozzles supplied by HPC Laser for the best compatibility and performance on your Bodor UK metal cutting system.

Single vs Double Layer

• Double-layer nozzles are best for carbon steel cutting, helping to reduce burrs and slag.
• Single-layer nozzles are ideal for stainless steel, preventing oxidation and producing a bright, smooth edge.

Picking the Right Diameter

• Small-diameter nozzles (around 1.0–1.5 mm) produce a faster gas jet, perfect for thin-sheet metal cutting.
• Larger nozzles (2.0 mm and above) give a slower flow that works better for thicker plate cutting.

Power & Cutting Conditions

If you’re running a high-power Bodor UK fibre laser — 12 kW or above — your nozzle choice makes a big difference:

• For positive-focus oxygen cutting, a double-layer nozzle gives a bright surface and excellent stability for long production runs.
• For negative-focus cutting, a single-layer nozzle delivers stronger focus and better molten material removal on thicker metals.

If you’re unsure, just ask our engineers — we’ll match the right nozzle to your specific Bodor laser cutter and application.

3. Maintaining and Replacing Laser Cutting Nozzles

Regular nozzle maintenance is key to consistent results. It only takes a few minutes, but it prevents poor cut quality and protects your fibre laser cutting head.

Keep the Height Right

Make sure the standoff distance between the nozzle and the metal sheet is correct. Too high, and the gas can’t clear molten material; too low, and the nozzle can get damaged or collide with the workpiece.

Routine Checks

• After each shift – Inspect the nozzle tip and ceramics, keeping them clean and dust-free.
• Check for air leaks – Test the seal between the nozzle and head. Replace any gaskets or seals showing wear.

When to Replace

Change the nozzle if you see:

• Damage, burning, or deformation at the tip
• Clogging or debris buildup
• Irregular cut edges, excessive slag, or rough striations
• Sparks or collisions during piercing or movement

Nozzles are inexpensive compared with downtime or damaged optics, so it pays to stay ahead.

4. Realigning After Changing a Nozzle

After replacement, it’s essential to re-align the laser beam to the centre of the nozzle. Misalignment causes poor edges and inconsistent cutting.

Quick check:

• Place masking tape over the nozzle.
• Fire a low-power pulse.
• Adjust the head until the burn mark sits perfectly in the centre.

Simple, quick — and it keeps your Bodor metal cutting machine performing like new.

Final Thoughts

Nozzles might be small, but they’re vital to your fibre laser metal cutting results. The right nozzle — kept clean, aligned, and replaced when worn — ensures the best possible cut quality and protects your machine investment.

At HPC Laser, an official Bodor UK partner, we stock a full range of genuine Bodor nozzles, lenses, and consumables.

Whether you’re cutting carbon steel, stainless, or aluminium, our team of experienced fibre laser engineers can help you get the most out of your system.

Need advice or replacement parts for your Bodor metal cutting machine?

Contact HPC Laser today for friendly, expert support — we’re here to keep your laser cutting running at its best.