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Why screw air compressor for laser cutting is a must?

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Laser cutting uses a strong laser beam to focus light on a small area. This heats the material quickly until it boils and turns into vapor. The laser moves across the material’s surface to make a cut and finish the job.

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The benefits of laser cutting include:


  • Excellent cutting quality: The small laser spot, high energy density, and fast cutting speed result in better cutting quality.
  • Thin and narrow incisions: The incisions made through laser gas cutting are thin and narrow, with parallel sides and good perpendicularity to the surface.
  • Smooth and attractive surfaces: The cutting surfaces are smooth and visually appealing, and in some cases, they can be used as the final processing step without the need for additional machining.
  • Minimal impact on material properties: The width of the heat-affected zone is small after laser cutting, which means the material properties near the cut are hardly affected. Additionally, there is minimal workpiece deformation, ensuring high cutting accuracy.

The table below shows a comparison of cutting speed between laser cutting and other cutting methods for low carbon steel plates.

Comparison of cutting speed of several cutting methods:

Cutting method Laser cutting Plasma cutting Oxyacetylene cutting Waterjet cutting
Cutting speed Very fast Fast Slow Very slow


  • High cutting speed: For instance, a 2500W laser can cut a 1mm thick cold-rolled carbon steel plate at a speed of 16-19 meters per minute.
  • Non-contact cutting: Laser cutting is a non-contact process, meaning there is no physical contact between the nozzle and the workpiece, which eliminates the need to worry about tool wear.

Laser cutting accounts for 39% of the laser equipment market

The laser market experienced growth in 2020, but the rate of increase slowed down compared to the previous two years.

The market sales revenue of laser equipment (including imports) across all industries reached 69.2 billion yuan, with a year-on-year increase of 5.17%. The uncertain global economic trend predicts that China’s laser equipment market will reach a total sales revenue of 74.0 billion yuan in 2021, marking a 6.94% rise from the previous year. In the industrial laser equipment market, laser cutting is the most commonly used application, accounting for 39% of the market.

Following closely are marking and welding, representing 19% and 12% of the market, respectively.


Advance towards high power, high precision and large format

In recent years, domestic laser cutting machine technology has experienced significant advancements and is now moving towards higher power, higher precision, and larger format capabilities.

In line with China’s push towards intelligent manufacturing, the industrial sector is undergoing a transformation from traditional processing to high-end manufacturing.

Consequently, experts anticipate that the market scale of China’s laser cutting sector will sustain its rapid growth trajectory.

Application of compressed air in laser cutting

Laser cutting machines are capable of meeting the cutting requirements of a wide range of materials and complex shapes. Along with a high-energy laser, auxiliary gases are also necessary to complete the cutting process.

The commonly used auxiliary gases for laser cutting include oxygen (O2), nitrogen (N2), and compressed air. Compressed air is the most accessible and affordable option compared to oxygen and nitrogen. It is frequently used as an auxiliary gas for laser cutting.

The quality of the compressed air has a direct impact on the quality of metal laser cutting. Factors such as gas pressure size and stability can affect the cutting outcome.

When selecting the size of the air compressor used for supporting the laser cutting machine, it is important to take into consideration the design of the laser cutting head, the required auxiliary gas pressure, and the nozzle size to ensure the best match between the air compressor and the laser cutting machine.

Comparison of laser cutting with different auxiliary gases

When performing laser cutting, the choice of cutting gas depends on the type of material being cut. The selection of the cutting gas and its pressure can significantly impact the quality of the laser cutting process.

The most commonly used auxiliary gases for laser cutting include oxygen (O2), nitrogen (N2), compressed air, and in some cases, argon (Ar).

The cutting gas can be categorized into high-pressure gas and low-pressure gas based on its pressure.

The main functions of laser cutting auxiliary gases include supporting combustion and heat dissipation, removing the molten residue generated during cutting, preventing the molten residue from rebounding back into the nozzle, and protecting the focusing lens.


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Scroll compression principle Compressor sucks air through air inlet located at outer scroll.Compression chamber goes smaller with rotary movement and trapped air is compressed.Compression chamber becomes minimum volume at the center of the scroll and air is pumped out through air outlet located at the center of scroll.These, suction, compression & discharging, process is repeated continuously. Long maintenance cycle with long life consumable parts. Compressor head replacement at every 10,000 hours or 4 years whichever comes earlier. Scroll oil free screw air compressor, 100% oil free for food industry, dental and medical industry. Technical parameter Model Capacity (m³/min ) Power (kW) Host architecture Exhaust pressure (Mpa) Noise (dB) Outlet diameter Dimensions (mm) L*W*H Weight (kg) DHH2OS 0.24 2.2 2.2*1 0.8 58±2 1/2 640*660*890 200 DHH3OS 0.41 3.7 3.7*1 0.8 58±2 1/2 640*660*890 220 DHH3OS 0.36 3.7 3.7*1 1 58±2 1/2 640*660*890 220 DHH5OS 0.60 5.5 5.5*1 0.8 58±2 1/2 640*660*890 240 DHH7OS 0.82 7.5 3.7*2 0.8 58±2 3/4 1000*690*990 300 DHH7OS 0.72 7.5 3.7*2 1 58±2 3/4 1000*690*990 300 DHH11OS 1.25 11 5.5*2 0.8 58±2 3/4 1000*690*990 340 DHH11OS 1.25 11 3.7*3 0.8 58±2 3/4 1150*690*1700 430 DHH11OS 1.08 11 3.7*3 1 58±2 3/4 1150*690*1700 430 DHH15OS 1.66 15 3.7*4 0.8 62±2 1 1490*1150*1290 620 DHH15OS 1.44 15 3.7*4 1 62±2 1 1490*1150*1290 620 DHH16OS 1.80 16.5 5.5*3 0.8 62±2 1 1150*690*1700 490 DHH18OS 2.14 18.5 3.7*5 0.8 65±2 1 1490*1150*1700 840 DHH18OS 1.77 18.5 3.7*5 1 65±2 1 1490*1150*1700 840 DHH22OS 2.55 22 5.5*4 0.8 65±2 1 1490*1150*1290 700 DHH22OS 2.55 22 3.7*6 0.8 65±2 1 1490*1150*1700 910 DHH22OS 2.11 22 3.7*6 1 68±2 1 1490*1150*1700 910 DHH30OS 3.40 30 3.7*8 0.8 68±2 5/4 1490*1150*2140 1140 DHH30OS 2.81 30 3.7*8 1 68±2 5/4 1490*1150*2140 1140 DHH33OS 3.60 33 5.5*6 0.8 68±2 5/4 1490*1150*1700 1010 Clean oil free compressed air Adopt 74 degree conicity dry seamless, more reliable seamless, eliminate air leakage. Not just compression process is oil free, but also on the afterward transportation adopt stainless steel pipe, stainless steel check valve, stainless steel air receiver(for air receiver mounted), ensure the quality of compressed air. High efficiency scroll air end Adopt the advanced oil free scroll airend, reliable bearing and grease, make sure the reliability and long life-span of airend, high precise machine for motivated scroll, fixed scroll and housing, ensure high efficiency of airend. Reliable seamless material, ensure compression chamber and lubricated transmit 100% be separate, ensure compressed air is oil free. High Reliability Cooling fan adopt integrated centrifugal impeller, low noise, high cooling air pressure, high cooling air, ensure the cooling air is enough, ventilation fan adopt silence axial fan, ensure the heat inside of cabinet could be eliminated in time. Heat exchange has been increased 20%-30%, anticorrosive treatment inner structure, after strict testing, ensure the exhausting air less than environment temp.+10-15ºC, reduce the burden of downstream equipment. Adopt direct driven, not belt driven, improve transmission efficiency & reliability, reduce the maintenance cost of changing belt. Project case 30Kw 120CFM compressor 8bar pressure oil free rotary scroll air compressor
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