What is the difference between laser cutting and waterjet cutting?

Laser cutting favors fast, clean work on thinner materials, while a waterjet handles a wider range of thick or heat-sensitive materials.

Lasers cut quickly and cleanly through thin materials such as sheet metal and acrylic. Waterjets use high-pressure water and abrasive to cut almost anything—including thick steel and stone—without heat damage.

Why the right cutter depends on heat and thickness

The choice is rarely about which machine is 'better' overall. A laser melts through material with a focused beam, so it is fast and clean on thinner work, but that heat can warp edges or damage heat-sensitive material. A waterjet cuts with high-pressure water and abrasive instead, so there is no heat damage and very thick or mixed materials are possible, usually at a slower pace. Matching the method to the material, thickness, and finish you need saves money, rework, and ruined stock.

What to do, step by step

1. Start with the material and its thickness; thin sheet and acrylic usually favour the laser's speed and clean edge.
2. Ask whether heat matters: if warping, hardening, or melting would ruin the part, choose the waterjet instead.
3. Consider the edge finish you need and whether extra sanding or machining would add time and cost later.
4. For thick steel, stone, or stacked mixed materials, lean waterjet; for many identical thin parts, lean laser.
5. Send the shop your file and material details, and ask them to confirm the method before cutting begins.