Laser Cutting Speed Calculator
Estimate a starting laser cutting speed based on material, thickness, laser power, and assist gas. Use the result as a process reference and verify final parameters with your machine-specific cutting chart.
Laser Cutting Speed Calculator
Enter your material and cutting conditions to estimate a starting cutting speed.
Estimated Cutting Speed
What Is Laser Cutting Speed?
Laser cutting speed is the linear speed at which the laser cutting head moves along the cutting path. It is commonly expressed in millimeters per minute (mm/min) or meters per minute (m/min).
Cutting speed is one of the most important process parameters in fiber laser cutting. It interacts with laser power, material thickness, assist gas, focus position, nozzle configuration, and other process conditions.
A suitable cutting speed helps balance productivity and cutting quality. Excessively high speed may result in incomplete cutting or unstable edges, while excessively low speed can increase heat input and may lead to excessive melting or dross.
How Is Laser Cutting Speed Estimated?
There is no single universal formula that can determine the exact cutting speed for every laser cutting machine. Industrial laser cutting normally relies on experimentally validated process parameters.
This calculator therefore uses a simplified engineering estimation model that considers laser power, material thickness, material type, assist gas, and cutting-quality requirements.
Material-specific correction factors are then applied to produce a practical starting-point estimate.
Laser Cutting Speed Parameters
| Parameter | Description | Typical Unit |
|---|---|---|
| Laser Power | Rated optical output power of the laser source. | W / kW |
| Material Thickness | Thickness of the sheet or plate being cut. | mm |
| Material | Type of metal being processed. | — |
| Assist Gas | Gas used to remove molten material from the kerf and influence the cutting process. | O₂ / N₂ / Air |
| Gas Pressure | Assist gas pressure at the cutting head. | bar |
| Cutting Speed | Linear movement speed of the cutting head. | mm/min |
How to Use the Laser Cutting Speed Calculator
Step 1: Select the Material
Choose the material you want to cut, such as carbon steel, stainless steel, aluminum, brass, or copper.
Step 2: Enter Material Thickness
Enter the actual material thickness in millimeters. Thickness has a significant effect on the required laser energy and achievable cutting speed.
Step 3: Enter Laser Power
Enter the rated laser source power of your cutting machine. For example, a 3 kW fiber laser should be entered as 3000 W.
Step 4: Select Assist Gas
Select oxygen, nitrogen, or compressed air according to your cutting application.
Step 5: Calculate
Click Calculate Speed to generate an estimated starting cutting speed.
Factors That Affect Laser Cutting Speed
1. Laser Power
Higher laser power generally provides more available energy for melting and cutting material. However, increasing machine power does not automatically mean that every material and thickness can be cut at a proportionally higher speed.
2. Material Thickness
As material thickness increases, more energy is required to establish and maintain a stable kerf. Cutting speed therefore generally decreases as thickness increases.
3. Material Type
Carbon steel, stainless steel, aluminum, copper, brass, and other metals have different thermal and optical properties. These differences affect laser absorption, heat transfer, melting behavior, and cutting performance.
4. Assist Gas
Oxygen, nitrogen, and compressed air can produce different cutting characteristics. Gas type and pressure influence molten-metal removal, oxidation, edge appearance, and process stability.
5. Focus Position
The focal position determines how the laser energy is distributed through the material thickness. An incorrect focus position can reduce cutting stability and edge quality.
6. Nozzle and Cutting Head
Nozzle diameter, nozzle condition, beam alignment, protective window condition, and cutting-head configuration can all influence the achievable cutting speed.
Why Cutting Speed Matters
Cutting speed affects both production capacity and process economics. For a production shop, even a small improvement in stable cutting speed can affect the number of parts produced per shift.
- Estimate laser cutting cycle time.
- Estimate production capacity.
- Compare different laser power levels.
- Estimate machine operating cost.
- Support preliminary laser cutting process planning.
Important Notes and Limitations
The calculator provides an engineering estimate and should not be treated as a certified cutting parameter database.
- Actual cutting speed should be verified through test cuts.
- Machine-specific cutting charts should take precedence over generic calculations.
- Laser source type and beam quality can affect results.
- Cutting-head and nozzle configuration can change the achievable process window.
- Material composition and surface condition can influence cutting performance.
- Edge-quality requirements may require a lower cutting speed.
Related Laser Cutting Tools
Frequently Asked Questions
What is a good laser cutting speed?
There is no single cutting speed that is suitable for every application. The appropriate speed depends on material type, thickness, laser power, assist gas, cutting-head configuration, focus position, and required edge quality. Use this calculator as a starting estimate and verify the final value with a test cut.
Does higher laser power increase cutting speed?
Higher laser power can provide more available energy and may allow higher cutting speeds or greater material thickness. However, the relationship is not linear for every material and process condition.
What is the unit of laser cutting speed?
Laser cutting speed is commonly expressed in mm/min or m/min. This calculator displays the primary result in mm/min and also provides the equivalent value in m/min.
Does assist gas affect laser cutting speed?
Yes. Assist gas type and pressure can affect molten material removal, oxidation, heat transfer, edge quality, and process stability. The effect depends on the material and cutting application.
Can I use this calculator as my final cutting parameter?
No. The result should be considered a starting-point estimate. Final cutting parameters should be established using the specific laser source, cutting head, nozzle, material, and machine configuration.
Need Help Selecting a Fiber Laser Cutting Machine?
If you are comparing laser power, cutting thickness, working area, or production requirements, our engineering team can help you evaluate a suitable laser cutting machine configuration.
Talk to Our Laser Cutting Experts