Complete Guide to Laser Cutting Assist Gases: O₂, N₂, Air, and Mixed Gas
Everything you need to know about laser cutting assist gases. When to use each type and how they affect speed and quality.
The LISHI LASER Mixed Gas Device delivers micro-oxygen cutting for laser machines from 3KW to 60KW. Burr-free edges, faster cutting speeds, and ultra-low power consumption.
Typical payback: 3–6 months · One device serves up to three lasers
Our nitrogen oxygen mixing device uses micro-oxygen laser cutting technology to produce a precisely calibrated N₂/O₂ mixed gas — eliminating burrs on carbon steel while delivering 3× faster cutting speed than traditional oxygen cutting. Designed for laser machines from 3kW to 60kW.
Raw materials stored in tanks, pressure 20–25 bar
Converts liquid gases to gaseous form
Stable pressure + proportional mixing → N₂ 95% / O₂ 5%
Output: 12–16 bar, flow rate up to 200m³/h
Input: N₂ + O₂ at 20–25 bar. Output: N₂ purity ~95%, pressure 12–16 bar, max flow 200m³/h. Compact gas tank (capacity >3m³).
800mm × 350mm × 1100mm, weight 90kg. One device supports up to three laser machines simultaneously (One-to-Three configuration).
High cutting speed + zero burrs. After installation, adjust ratio between N₂ 95% and O₂ 5% for different board thicknesses. Built-in program analyzes usage ratio and records gas purity requirements.
Works with all major brands: HAN'S, DNE, PENTA, LEAD, HSG, and more. Compatible with BODOR, JIATAI, HG LASER, XUNLEI, and other global brands.
Burr-free edges, 3× faster cutting speed, and near-zero electricity cost. Our maintenance-free gas supply system is compatible with Han's laser, DNE, PENTA, LEAD, HSG, BODOR and other major brands.
Increase laser cutting speed up to 3× compared to oxygen cutting. Example: 8mm carbon steel at 16m/min with mixed gas vs only 2–3m/min with O₂.
Unlike nitrogen cutting which produces burrs on plates ≥8mm (12kW) or ≥10mm (20kW), mixed gas cutting produces clean, burr-free surfaces on carbon steel — no secondary grinding needed.
Only 2 kWh per 24 hours — near-zero electricity cost. Unlike air compressors that consume 15–30 kW continuously, the mixed gas device operates with minimal power draw while delivering 3× faster cutting performance.
Power consumption: only 2 kWh / 24 hours. Unlike air compressors requiring filter/oil changes every 3,000 hours, our industrial laser gas equipment is maintenance-free.
The only manufacturer with stable one-to-three mixed gas equipment. One industrial gas mixing station powers up to three laser machines of different power levels simultaneously.
Air compressors risk oil/water contamination burning laser head lenses ($5,000–$50,000 loss). Our pure liquid gas source keeps your optical system 100% safe.
| Factor | Mixed Gas | O₂ (Oxygen) | N₂ (Nitrogen) | Air |
|---|---|---|---|---|
| Cutting Speed | 3× faster (e.g. 16m/min @ 8mm CS) | 2–3m/min @ 8mm CS | Similar to mixed gas | 30% slower than mixed gas |
| Cut Surface | Smooth, no burrs | Oxidized, rough edges | May have burrs on thick plates | Contaminated, rough |
| Gas Consumption | Uses N₂ + O₂ blend | Similar total | High | Very high (compressor) |
| Power Cost | 2 kWh/24h | High | High | Very high (compressor) |
| Small Hole Piercing | Some burrs during pierce | Best for small holes | Good | Poor |
| Equipment Protection | No pipeline contamination | Standard | Standard | Risk of lens contamination |
See how much more you can produce — and earn — by switching from O₂ to LISHI LASER mixed gas. Based on real cutting speed data from end users worldwide.
Cutting Speed
Cutting Speed
Estimated Annual Profit Increase (USD)
$0
Theoretical upper bound based on your inputs. Real-world results depend on job mix, nesting efficiency, and machine uptime.
Get detailed cutting data tailored to your 12KW–60KW laser setup.
Or contact us directly: WhatsApp +52 557 208 0065
Most users choose air compressor for low upfront cost, but three hidden costs eat into your profit.
2 kWh/24h — almost maintenance-free
~$73/year electricity
Silver-white surface, zero burrs
Ready for immediate delivery
100% safe — pure liquid gas source
Zero optical risk
While air seems free, your real cost is in maintenance, rework, and lens replacement. Mixed gas costs less in the long run — and delivers superior quality.
Optimal carbon steel cutting thickness range for each laser power level. Mixed gas delivers consistent high-speed cutting across all thicknesses.
| Thickness | Mixed Gas Speed |
|---|---|
| 1mm | 28–35 m/min |
| 2mm | 16–20 m/min |
Best for ≤2mm carbon steel
| Thickness | Mixed Gas Speed |
|---|---|
| 1mm | 35–45 m/min |
| 2mm | 20–25 m/min |
| 3mm | 12–14 m/min |
| 4mm | 8–10 m/min |
| 5mm | 6–7 m/min |
| 6mm | 5–6 m/min |
Best for ≤6mm carbon steel
| Thickness | Mixed Gas Speed |
|---|---|
| 6mm | ~18 m/min |
| 10mm | 4.5–5 m/min |
| 12mm | ~4 m/min |
| 16mm | 3–4 m/min |
Best for ≤16mm carbon steel
| Thickness | Mixed Gas Speed |
|---|---|
| 2mm | 22 m/min |
| 6mm | 18 m/min |
| 8mm | 16 m/min |
| 10mm | 12–14 m/min |
| 12mm | 10–12 m/min |
| 16mm | 5–6 m/min |
| 20mm | 3–4 m/min |
| 25mm | 2.5–3 m/min |
Best for ≤25mm carbon steel
| Thickness | Mixed Gas Speed |
|---|---|
| 8mm | ~16 m/min |
| 10mm | ~12 m/min |
| 12mm | ~10 m/min |
| 16mm | ~8 m/min |
| 20mm | ~5.6 m/min |
| 25mm+ | Contact for details |
Best for ≤30mm carbon steel
| Thickness | Mixed Gas Speed |
|---|---|
| 25mm | ~10 m/min |
| 30mm | ~7 m/min |
| 40mm | ~3.5 m/min |
| 45mm | ~2 m/min |
Best for ≤45mm carbon steel
40KW parameters also available. Contact us for detailed data.
View All Parameters →Actual cutting footage from end users worldwide. No embellishment — real data, real performance.
Dual power setup, one machine feeds two — burr-free quality, zero compromise on speed
Mixed gas for high-power lasersThick plates, no burrs. 10–14 m/min on 10mm, previously only achievable with O₂
High-power mixed gas cuttingUltra-thick cutting at 3.5 m/min. Where N₂ struggles, mixed gas delivers
Ultra-high power mixed gasSmooth aluminum edges, no oxidation. Faster than air, cleaner than N₂
Aluminum mixed gas cuttingPrecision aluminum cutting with micro-oxygen — speed and quality in one pass
Thin aluminum mixed gasPaper-thin aluminum, zero burn-through. Mixed gas enables what N₂ cannot
Precision thin aluminum cuttingDeployed across the world's leading manufacturing economies — Europe, North America, Japan, Korea, Australia, and New Zealand — with active market operations in every major developed market.
Seeking qualified distributors in developed markets. One demo unit, one proven product, one growing brand.
Real deployments. Real data. Real outcomes.
A major sheet metal fabricator upgraded four BODOR lasers with LISHI mixed gas. Cutting speed jumped from 2.3 m/min to 7.1 m/min. Grinding department reduced from 6 workers to zero.
Read full case study →30kW PENTA laser paired with LISHI mixed gas device. Achieved 16 m/min on 8mm, 9.3 m/min on 12mm — all burr-free. "Extremely clean cut" per on-site engineer.
Read full case study →Compatible with all major fiber laser manufacturers worldwide
1,000+ installations worldwide • 3kW to 60kW supported
A mixed gas device precisely blends liquid nitrogen (N₂) and liquid oxygen (O₂) into a calibrated N₂/O₂ gas mixture (typically 95%/5%). This micro-oxygen mixture is used as the auxiliary gas in high-power laser cutting, delivering 3× faster cutting speed on carbon steel compared to pure oxygen, while eliminating burrs entirely.
Yes. The LISHI LASER Mixed Gas Device works with all major laser brands including HAN'S, DNE, PENTA, LEAD, HSG, BODOR, JIATAI, HG LASER, and XUNLEI. It supports machines from 3kW to 60kW. If your machine uses standard auxiliary gas connections, it is compatible.
Cutting range depends on laser power: 3kW handles up to 2mm carbon steel, 6kW up to 6mm, 12kW up to 16mm, 20kW up to 25mm, 30kW up to 30mm, and 60kW up to 40mm. It also cuts stainless steel and aluminum with excellent results.
The mixed gas device consumes only 2 kWh per 24 hours — near-zero electricity cost. The primary savings come from 3× faster cutting speed (more parts per shift) and eliminating manual deburring labor. Gas costs may be similar or slightly higher than pure N₂, but the throughput and quality gains far outweigh this for professional laser cutting shops.
No. Unlike air compressors that need filter/oil changes every 500–3,000 hours, the LISHI Mixed Gas Device is maintenance-free. It uses pure liquid gas sources with no moving parts that wear out. Power consumption is just 2 kWh/24h.
Yes. LISHI LASER is the only manufacturer offering a stable One-to-Three configuration. One mixing station can simultaneously supply up to three laser machines of different power levels (e.g., one 3kW and one 20kW).
Air cutting produces oxidized, rough edges and risks oil/water contamination that can burn expensive laser head lenses ($5,000–$50,000). Mixed gas delivers smooth, burr-free, silver-white cut surfaces with zero contamination risk — and cutting speeds 30% faster than air.
Installation is straightforward and typically completed within one day. The device connects to your existing liquid gas supply and laser machine. We provide detailed installation guides and remote technical support for all customers.
Expert guides on assist gas selection, cutting parameters, and cost optimization for 3kW–60kW fiber laser machines.
Everything you need to know about laser cutting assist gases. When to use each type and how they affect speed and quality.
Data-driven comparison: 2.5-3.6× faster cutting, equivalent edge quality, 33% less nitrogen consumption.
Real nitrogen cost analysis with per-machine savings calculations. See exactly how the 33% N₂ reduction works.
Connect one device to your laser machine and start cutting 3× faster today. Available for 6KW–60KW machines.