Laser cutting machine nozzle（Cut mouth）A Guide to Avoiding Pitfalls（Selection·use·maintain·replace）

This article covers materials、Aperture、double layer single layer、Install、high、clean、Fault diagnosis，Help you avoid all mouth-cutting traps at once。

one、nozzle（Cut mouth）Selection and pit avoidance guide

1. Brand star ranking（Real reference for export-level laser machines）

★★★★★ top brands：PrezterPrecitec、JiaqiangRaytools、Wan ShunxingWSX。Original and authentic，High precision、Strong durability，High-end laser machine standard configuration。

★★★★☆ First-line brand：Oster、Hao cool、Profession。Stable quality、High cost performance，Mainstream choice for commercial laser machines。

★★★☆☆ Second-tier brands：Ordinary domestic copper mouth。Meet basic usage，Average accuracy、Shorter life。

★★☆☆☆ Low end and inferior quality：Miscellaneous copper、Many impurities、Rough inner wall、Size is not standard，It is easy to cause cutting residue、Block the hole、Explosive gun。

2. The material must be pure copper，Never buy miscellaneous copper、brass

Laser cutting nozzle must be usedHigh purity copper（T2Oxygen-free copper），Fast heat conduction、High temperature resistance、No deformation。

Inferior copper/brass → High temperature difference、Easy to deform、The inner wall is not smooth → Directly leading to cutting slag、Section difference、Burnt out laser head。

3. Single layer mouth vs double mouth，Don't use it wrong

single layer nozzle：Suitable for air cutting、oxygen cutting、Thin plate cutting。

Double layer nozzle：Suitable for nitrogen high pressure cutting、Stainless steel、aluminum plate、Thick plate cutting。

Wrong type → Serious slag hanging、The cross section turns black、Cutting failed。

4. How to choose aperture size？If you choose the wrong one, the board will be scrapped.

0.8–1.2mm：sheet、low power、air cutting。

1.4–1.8mm：Medium board、Commonly used standard apertures。

2.0–3.5mm：thick plate、High pressure nitrogen、High power cutting。

Aperture too small → Insufficient air pressure、Hanging residue；Aperture too large → waste of gas、Unstable cutting。

two、Install and use pit avoidance

1. The installation must be tightened，But you can't force her with force.

Can't tighten → Air leakage、Unstable air pressure、Poor cutting；Violent torture → Thread sliding thread、Damage to laser head。

Correct way：Use special wrench，Just tighten it appropriately。

2. Capacitor height must be calibrated，Otherwise, there will be a collision

height too high → Hanging residue、Perforation is slow、Inability to cut。

height too low → Talk directly、Nozzle deformation、Damage to laser head。

Every time you replace the nozzle, you mustRecalibrate capacitor height。

3. New nozzles must be inspected：Concentricity、inner wall、Roundness

Inferior nozzle eccentricity、deformation、Rough inner wall → Turbulent airflow → Cutting quality is directly scrapped。

Must be visually inspected before installation+Air blow check，Ensure no deformation、No clogging、No favoritism。

three、Maintenance and replacement of pit avoidance

1. Must be cleaned regularly，Splatter can ruin cut quality

Nozzle surface、Once slag sticks to the inner wall → airflow deformation → Hanging residue、glitch、Abnormal cutting。

suggestion：per cut1–2Clean every hour，use alcohol+Clean gently with cotton swab。

2. These situations occur，Must be replaced immediately

✅ There is slag on the inner wall、scratches → Change now

✅ Nozzle deformation、Not round、eccentric → Change now

✅ Cutting suddenly hangs slag、Increased burrs → Change your mouth first

✅ Perforation slows down、Frequent fire breaks → Change your mouth first

3. Polishing is strictly prohibited、Continue to use after repair

Many customers polish the nozzles to save money，result in size、All concentricity is invalid，Cut quality is worse，Instead, it’s a waste of materials and time.。

Four、Common nozzle faults and pit avoidance

1. Explode frequently、clash

reason：height not calibrated、The countertop is uneven、The board is lifted、Capacitor failure。

solve：school platform surface、Calibration capacitor、Check sensor。

2. Cutting residue、Many burrs

reason：Wrong aperture、Single layer and double layer use reverse、Dirty nozzle、Nozzle deformation。

solve：clean、Replace the nozzle with the correct model。

3. clogged stomata、Cut off the fire

reason：Slag falls in、gas impurities、Incorrect cutting parameters。

solve：Clean the pores、Replace with new mouth、Check gas filtration。

five、Laser cutting machine nozzle（Cut mouth）Summary of pit avoidance

1. Material：mustT2pure copper，Reject miscellaneous copper、brass。

2. type：Air/For oxygenSingle layer mouth；Nitrogen/For stainless steeldouble mouth。

3. Aperture：Small holes for thin plates，Large holes for thick plates，Match by power。

4. Install：Capacitor height must be calibrated，Do not tighten violently。

5. maintain：Regular cleaning，deformation、Replace sticky residue immediately。

6. brand：Priority to originalPrecitec、Raytools、WSX，The most stable quality。

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