Waterjet Cutting vs Laser Cutting: An Ultimate Comparison To Make

The modern manufacturing world is not about strength but precision. One tool cuts with a stream of water, while the other cuts with a concentrated beam of light. When it is about choosing, it’s about water vs heat, fluid force vs focused energy, and waterjet cutting vs laser cutting.

Although both technologies have changed the way we cut materials, each of them has its own pros and cons. The choice depends on your project and requirements. So choosing between them is beyond technical – it’s strategic.

In this article, we will guide you through the debate: waterjet cutting vs laser cutting to give you a better understanding.

What is Waterjet Cutting?

Waterjet cutting or waterjetting is a method used for cutting materials. It uses a high-pressure stream of water to cut them. The process can be split into two categories: pure waterjet cutting, which uses water, and abrasive waterjet cutting, which uses a stream mixed with particles like aluminum oxide or garnet (this is most commonly used to handle tougher surfaces).

How does waterjet cutting work? The water pumped from a reservoir is processed into an intensifier that increases the pressure up to 4,000 bars – astonishing! This water that is pressurized is stored in an accumulator, and then it is released through a small nozzle – at a speed of around 1000 meters per second.

It is usually used for softer materials like plastic, rubber, wood, and more. But with abrasives (aluminum oxide and garnet) added inside the chamber of the nozzle, the stream becomes capable of eroding harder materials – metal, stone, tempered glass, ceramics, and even diamonds.

What is Laser Cutting?

A laser cutter is a method that uses a highly concentrated beam of light to cut or engrave materials. It is cut by burning the material to melt or vaporize. The workpiece material is kept on the flatbed, and it moves in coordination with the laser head. The light is then focused and redirected to the exact point to create clean cuts.

The light is narrow at 0.0125 inches (0.32 mm) in diameter. It creates extremely small cuts (as small as 0.004 inches (0.10 mm) depending on the thickness of the material. A pre-programmed path set like CAD (computer-aided design) software guides the laser to cut detailed and intricate parts.

There are two main types of lasers used: CO2 lasers for non-metal materials and Fiber Lasers for cutting metals and reflective surfaces. Speed and Precision are what define laser cutters as they operate at cutting speeds from 20 to 70 inches per minute – impressive.

Waterjet Cutting VS Laser Cutting

1. Accuracy

Waterjet vs laser cutting in precision and accuracy deliver high-quality products. And talking about the kerf width, both have a small kerf width; waterjet cutting has a kerf of about 0.7mm to 1.02 mm, and laser cutting has 0.08mm to 1mm, so both make fine detailing and intricate shapes.

When compared, laser cutters are more accurate than waterjet cutting and are best for applications with tight tolerances.

2. Speed

The average cutting speed of a waterjet cutter is 1 to 20 inches per minute, but for softer materials it can go up to 90 inches per minute. Meanwhile, the laser cutters’ speed is anywhere from 20 to 1000 inches per minute. This differs with laser power, where, for example, a 500W laser cutter cuts 1mm at a speed of 10m/min, while a 3KW laser cutter cuts 35m/min.

When compared, lasers are faster than waterjet machines, where, for example, modern high-power fiber lasers can cut up to 80 to 100 times faster than waterjet cutting.

3. Versatility

Both cutters can cut hard materials.

Laser Cutter:

Waterjet Cutter:

When you look at the chart above, you can see that waterjet is capable of cutting a lot more materials than laser cutters. This is because even though laser cutters cut a wide variety, there are still some limitations. Laser cutters can cut only a certain range of thickness, but waterjet cutters can cut thicker materials. Depending on the water pressure and the abrasives, they can go much deeper when compared.

4. Waste Produced

When it is about waterjet cutting vs laser cutting in terms of waste produced,

Laser cutters’ waste production is less, while waterjet produces high waste. Laser cutters solely focus on the exact spot that needs to be cut. With the process of nesting parts, it removes materials efficiently, reducing the need for reworks, and hence produces less overall waste. Waterjet cutters involve a more extensive cleanup as they may produce high waste, and they should be properly handled. (Minimizing unwanted cuts can be a slow process with increased cost)

5. Costs

Waterjet Cutting vs Laser Cutting; both have their own cost considerations, and your choice depends on the nature and scale of your project.

Laser cutters work with a programmed cutting path, and so the machine does its job, making setup efficient and cost-effective. Moreover, laser components have become much more affordable with the growing demand. But the biggest expense would be power consumption, especially for high-powered machines. Despite this, high speed and precision make laser cutting cost-effective for long runs.

Waterjet machines are usually lower in initial cost, but the operating costs can add up quickly. This is because of the multiple consumables and components that erode over time. You also might have to regularly maintain the water pump for effective performance.

Waterjet Cutting vs Laser Cutting: How to Choose?

Choosing between them doesn’t depend on which method is better, but on which one suits your project.

Choose Waterjet Cutting if:

• You’re working with thick or heat-sensitive materials
• You want to avoid heat affected zones that damage materials
• The project has dense or layered materials
• You’re not very concerned about the slight rough edges
• You prefer a lower upfront machine cost

Best for: Aerospace parts, stone fabrication, automotive components, and mixed-material projects.

Choose Laser Cutting if:

• You’re working with thin to moderately thick materials
• You’re concerned about high precision and fine detail
• Your materials are non-metallic or light metals
• You want clean, smooth edges with minimal post-processing
• You need fast turnaround times and consistent cuts for large batches
• You’re aiming for a lower ongoing maintenance cost and less mess

Best for: Aerospace parts, automotive components, Electronics, signage, jewelry, decorative items, and lightweight sheet metal.

Explore Cesar CNC to find a range of fiber laser cutting machines. Upgrade your workshop with the precision and power of fiber laser technology to deliver clean, fast, and efficient results.

Final Takeaway

Now, as you might have gotten what you want based on the debate on waterjet cutting vs laser cutting, you can make the right decisions in purchasing the right one. Evaluate the factors and purchases depending on the priorities you have.