Cutting
Laser Cutting vs Waterjet Cutting
Laser cutting is fast and precise on thinner metals with a heat-affected zone; waterjet cuts almost any material cold at any thickness but slower. The choice hinges on material, thickness, and edge quality.
| Laser Cutting | Waterjet Cutting | |
|---|---|---|
| Method | Focused laser melts and vaporizes | High-pressure abrasive water erodes |
| Heat-affected zone | Yes, small | None, cold cut |
| Max thickness | Up to ~25 mm steel typical | Up to 150 to 200 mm |
| Materials | Metals, some plastics, wood | Almost anything, including glass and stone |
| Edge tolerance | 0.05 to 0.2 mm | 0.1 to 0.4 mm |
| Speed on thin metal | Fast | Slower |
| Operating cost | Lower per hour | Higher, abrasive consumable |
Choose Laser Cutting when
- Cutting thin to medium metal sheet at speed
- You need tight edges and high throughput
- Material tolerates a small heat-affected zone
Choose Waterjet Cutting when
- Material is thick, reflective, heat sensitive, or non-metal
- You cannot accept any heat-affected zone
- Cutting composites, glass, stone, or stacked plate
The verdict
Choose laser for fast, precise cuts on thinner metals where a small heat zone is acceptable, and waterjet when the material is thick, heat sensitive, reflective, or non-metallic and a cold cut is required.
Cost comparison
Laser operating cost typically runs 15 to 30 USD per hour against 25 to 45 USD for waterjet, mostly garnet abrasive at 20 to 40 cents per pound. On 3 mm steel a laser may cut 4 to 8 times faster, compounding the gap. Waterjet becomes the cheaper path only when material thickness, reflectivity, or heat sensitivity would force the laser into slow, multi-pass, or impossible territory.
Common questions
Is waterjet or laser cutting more accurate?
Laser cutting generally holds slightly tighter tolerances on thin metal, while waterjet stays accurate on thick material and leaves no heat-affected zone.