A Guide to how to Choosing the Perfect Fiber Laser Cutting Nozzle?

The Choice of Laser Cutting Nozzles: Key Considerations

Laser cutting nozzles, often overlooked yet critically important, can significantly impact the performance of your fiber laser cutting machine. In this comprehensive guide, we delve into the intricacies of laser cutting nozzles, helping you make informed decisions for optimal cutting results.

Fiber Laser Cutting Nozzles

 Types of Laser Cutting Nozzles

When it comes to laser cutting, there are two main types of nozzles: single-layer and double-layer nozzles.

Single-Layer Nozzles: These are ideal for precision cutting, especially with materials like stainless steel, aluminum, and copper. They excel in applications where accuracy and surface quality are paramount.

Double-Layer Nozzles: Designed for high-speed cutting, double-layer nozzles typically use oxygen as an assist gas for cutting iron sheets and similar materials. Their higher gas flow rates enable faster cutting speeds.


Quality Matters: Laser Cutting Nozzle Selection

The quality of your laser cutting nozzle plays a pivotal role in the overall performance and longevity of your machine. Opting for reputable manufacturers ensures a high level of integration, efficiency, and technical quality. At STARTNOW Laser, we specialize in delivering top-notch laser products and components, offering stability and reliability for your cutting needs.


Choosing the Right Nozzle Aperture Size

The size of the aperture in your fiber laser cutting machine's nozzle depends on the material thickness you're working with. This aperture size directly affects gas flow rates and, consequently, the removal of molten material.


  • For materials under 3.0mm thick, a 1.0mm aperture diameter nozzle provides stability.

  • When dealing with thicker materials (above 3.0mm), a 1.5mm aperture diameter nozzle ensures stable cutting.

  • Materials exceeding 10.0mm in thickness typically require nozzles with diameters of 2.0mm or more. However, larger apertures offer less protection to the focusing lens.

Selecting the appropriate aperture size is essential for efficient laser cutting, enhancing product processing, and improving production efficiency.

Laser Cutting Nozzle aperture size


The Impact of Laser Cutting Nozzles on Cutting Performance

Laser cutting nozzles influence cutting performance by maintaining pressure between the workpiece and the nozzle, controlling high-pressure airflow direction and pressure, and preventing splatter from reaching the laser head. They also transmit capacitive signals for height adjustment, ensuring system stability.

Essential Requirements for Laser Nozzle Selection

1.Material: Copper or brass are common nozzle materials. High-quality T2 copper offers excellent conductivity, sensitivity, and thermal efficiency, ensuring reliable capacitive signals and durability. 

2.High Precision: Nozzles should exhibit concentricity of 0.03mm for 1.0mm or smaller diameters and 0.02mm for smaller nozzles. Superior concentricity reduces initial adjustment needs and minimizes laser head damage.

3.Smooth Surfaces: Nozzles should feature a roughness of up to 0.8 on both inner and outer surfaces. A polished outer surface minimizes material adhesion during cutting, extending nozzle life, while a polished inner surface prevents vortex formation, improving cutting quality and efficiency.

4.Strict Anti-Oxidation Treatment: Copper components are prone to oxidation when exposed to air, resulting in discoloration. High-gloss processing of nozzle surfaces increases susceptibility to oxidation, leading to darkening or yellowing.

By considering these factors and requirements, you can confidently select the right laser cutting nozzle for your fiber laser cutting machine, ensuring exceptional cutting performance and longevity. Regular nozzle inspection and maintenance are crucial for maintaining cutting quality.

Unlock the Full Potential of Your Fiber Laser Cutting Machine with the Perfect Nozzle Selection!

Fiber laser cutting machine parts

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