What Is Waterjet Cutting?

what is waterjet cutting

Waterjet cutting, a marvel of modern engineering, stands out as a versatile and precise method for slicing through a myriad of materials. This innovative technique harnesses the power of high-pressure water, often combined with abrasive particles, to cut through metals, glass, stone, and more with remarkable accuracy. Unlike traditional cutting methods, waterjet cutting minimizes heat distortion, making it ideal for intricate designs and delicate materials.

In this blog, we’ll delve into the intricacies of waterjet cutting, exploring how it works, its unique advantages, and the diverse applications that make it a preferred choice in various industries.

Basics of Waterjet Cutting

Waterjet cutting is a kind of sheet metal manufacturing process cutting. It revolutionizes the way we slice through materials. At its core, this method employs a high-velocity jet of water, sometimes mixed with abrasive substances, to cut a wide range of materials with unparalleled precision.

Water jet cutting has evolved significantly since the 1950s for cutting lumber. Initially, it utilized only water streams, but the introduction of abrasives in the 1980s enhanced its cutting capabilities, allowing for the effortless slicing of harder materials like metals and ceramics. 

This evolution marks a significant leap from its humble beginnings, offering a non-thermal, environmentally friendly cutting solution.

Today, waterjet cutting stands as a testament to technological advancement, combining power and precision to meet diverse industrial needs.

How Waterjet Cutting Works

working principle of water jet cutting

Water jet cutting operates through a fascinating interplay of mechanics and high-pressure technology. At the heart of a waterjet cutter lies a high-pressure pump, which propels water at speeds up to three times the speed of sound, creating a jet capable of slicing through materials with ease. This jet passes through a narrow nozzle, focusing the water stream into a precise cutting tool.

The real magic happens when abrasives are added to the mix. In abrasive waterjet cutting, fine granular substances, such as garnet, are introduced into the water stream. This combination enhances the cutting power, enabling the jet to effortlessly cut through harder materials like steel, granite, or composite. The abrasive particles act like a myriad of tiny, swift chisels, eroding the material at the point of contact.

The cutter is typically mounted on a multi-axis system, allowing it to make intricate cuts in various dimensions. Controlled by sophisticated software, it can follow complex patterns with high precision. The water and abrasive mixture exits the nozzle at a pressure ranging from 30,000 to 90,000 pounds per square inch (PSI), ensuring a clean and precise cut.

This machining process is not only efficient but also environmentally friendly, as it generates no hazardous waste and minimizes material wastage. The ability to cut without generating heat also prevents material distortion, making waterjet cutting a versatile and desirable choice in industries where material integrity is paramount.

Types of Waterjet Cutting

Waterjet cutting technology is broadly categorized into two types: pure waterjet cutting and abrasive waterjet cutting. Each type has distinct characteristics and applications, making them suitable for different materials and cutting requirements.

Pure Waterjet Cutting:

Pure water jet cutting utilizes only high-pressure water for cutting and is remarkably effective for slicing softer materials. It’s commonly used for products like rubber, foam, or textiles. This method offers a clean cut without any abrasives, making it ideal for soft materials that could be damaged or contaminated by grit. The precision and gentleness of pure waterjet cutting make it a go-to choice for delicate or easily damaged materials.

Abrasive Cutting:

Abrasive Cutting

In contrast, abrasive jet cutting combines water with abrasive materials like garnet. This method is essential for cutting harder materials such as metals, stone, or glass. The added abrasives give the water jet the necessary cutting power to slice through these tougher substances efficiently. This type is favored in industries requiring intricate cutting of hard materials, where precision and smooth edges are critical.

Benefits of Using WaterJet Cutting

Waterjet technology offers several compelling advantages:

Precision and Accuracy: Waterjet cutting is renowned for its ability to make highly precise and accurate cuts. The technology allows for intricate designs and tight tolerances, making it ideal for complex shapes and detailed patterns.

Versatility in Cutting Various Materials: Whether it’s metals, glass, stone, or composites, waterjet cutting handles a diverse range of materials with ease. Its versatility extends to thickness variations, providing consistent quality across different material types and sizes.

Environmental and Safety Benefits: This eco-friendly cutting method produces no hazardous waste. Additionally, as a cold-cutting process, it eliminates heat-affected zones, reducing the risk of material warping and ensuring safer working conditions by minimizing the risk of burns and thermal distortions.

Applications of Water jet Cutting

Water jet cutting is a manufacturing process that uses high-pressure jets of water provided by pressurizing pumps that deliver a supersonic stream of water to cut and shape various materials. It is utilized across various industries due to its versatility and precision:

waterjet cutting part

Aerospace Industry: Used for cutting, shaping, and reaming aerospace components like titanium bodies for aircraft and intricate components for space vehicles.

Manufacturing Sector: Ideal for creating custom parts, machinery components, and intricate metalwork.

Automotive Industry: Employed in fabricating parts like interior panels, gears, and components requiring precise cutting.

Art and Design: Water jet cutting is popular for creating intricate designs in materials like stone, glass, and metals for decorative purposes.

Construction and Architecture: Used for cutting tiles, stone, and glass for building facades, flooring, and decorative elements.

Examples of products and components include intricate metal parts, custom automotive components, artistic installations, architectural elements, and detailed aerospace components. This technology’s adaptability allows for precision in both industrial and creative applications.

Comparing Waterjet Cutting with Other Cutting Technologies

Water jet cutting stands out when compared to other popular cutting technologies like laser cutting and plasma cutting, each having unique strengths and ideal applications.

waterjet vs. laser cutting

Laser Cutting:

There are some differences between waterjet cutting and laser cutting. Laser cutting uses a focused laser beam to melt, burn, or vaporize material. It’s incredibly precise, especially for very small features and complex geometries. However, it generates heat, which can affect the material’s properties and is less effective for thicker materials. Laser cutting is ideal for materials like metals, plastics, and wood, but its heat generation limits its use with heat-sensitive materials.

Plasma Cutting:

Plasma cutting is effective for cutting thicker metal materials and is faster than both waterjet and laser cutting for certain applications. However, it’s less precise than waterjet cutting and can cause thermal distortion in materials. Plasma cutting is best suited for rough cuts in thick metal sheets where precision is not the primary concern.

In contrast, waterjet cutting offers a cold-cutting process, eliminating heat-induced distortions and allowing for cutting a broader range of materials, including metals, glass, stone, and composites. Its versatility and precision make it a preferred choice for applications requiring intricate details and material integrity.


What materials can be cut with a water jet cutter?

Waterjet cutting is incredibly versatile, capable of slicing through various materials, including metals, glass, stone, ceramics, and composites. It’s also effective for softer materials like rubber, foam, and textiles, especially when using pure waterjet cutting without abrasives.

How does water jet cutting compare in terms of precision to other methods?

Waterjet cutting is renowned for its high precision and accuracy, surpassing many traditional cutting methods. It allows for intricate designs and tight tolerances, making it ideal for detailed and complex shapes, where precision is paramount

Can waterjet cutting be used for industrial-scale projects?

Waterjet cutting is widely used in various industries for large-scale projects. Its ability to handle diverse materials and thicknesses, coupled with its precision, makes it suitable for industrial applications, including aerospace, automotive, and manufacturing sectors.

What are the limitations of waterjet cutting?

While versatile, water jet cutting has limitations, such as slower cutting speeds compared to methods like plasma cutting. It can also be more expensive due to high operational costs, including water and abrasive materials. Additionally, the process generates a significant amount of noise and requires effective water management.


In conclusion, water jet cutting emerges as a highly versatile and precise cutting technology, suitable for a wide range of materials and applications. Its ability to maintain material integrity while offering intricate cutting capabilities makes it a valuable tool in numerous industries. Whether you’re dealing with complex aerospace components, artistic installations, or custom automotive parts, waterjet cutting offers a solution that combines precision with versatility.

If you’re looking for expert services in CNC machining and sheet metal fabrication, don’t hesitate to contact us. Our team of skilled professionals is equipped to provide top-notch services tailored to your specific needs, ensuring quality and precision in every project.