Waterjet Cutting Service
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Waterjet cutting is an industrial method that uses a high‑pressure stream of water — sometimes mixed with an abrasive such as garnet sand — to cut through a wide variety of materials. Unlike laser or plasma cutters, waterjet systems are cold cutting processes. They do not create heat‑affected zones or introduce thermal stresses, so they preserve the material’s integrity. The technique originated in the 1930s when the Paper Patents Company used a narrow jet of water to cut paper. Subsequent research in the 1950s and 1960s led to ultra‑high‑pressure jets capable of cutting metals, and the addition of abrasives such as garnet in the 1980s turned waterjet cutting into a versatile machining tool.
BACH INDUSTRY AG is a European supplier of precision waterjet cutting systems and services. We offer 3‑axis and 5‑axis CNC waterjet cutters, high‑pressure pumps, garnet abrasive and supporting accessories for customers in Switzerland, Germany, Austria, Liechtenstein, Belgium, and across Africa. Our solutions range from small cantilever machines for prototyping to large gantry systems designed for industrial production. In this article we outline how waterjet cutting works, its advantages and limitations, and why BACH INDUSTRY AG is an ideal partner for businesses looking to buy or upgrade a waterjet cutter.
How Waterjet Cutting Works
Waterjet cutting machines operate by pressurising water to extremely high levels and directing it through a small nozzle to create a focused jet stream. Modern pumps can generate pressures between 60 000 psi and 90 000 psi. In abrasive waterjet cutting, a mixing chamber adds uniformly sized garnet sand to the water stream. The abrasive particles enhance the cutting ability, allowing the jet to erode metals, stone, ceramics or composites. Key components include the high‑pressure pump, mixing chamber, jet nozzle, X‑Y motion system and catcher tank. The process involves:
Pressurisation – Intensifier or direct‑drive pumps elevate water pressure to ultra‑high levels.
Abrasive mixing – When cutting hard materials, garnet abrasive is mixed into the jet. The quality of the abrasive directly influences precision.
Jet formation – Water and abrasives pass through a jewel orifice (often sapphire or diamond) and focusing tube to form a high‑energy jet.
Material removal – The CNC‑controlled jet follows a programmed path, eroding the material without heat. The catcher tank absorbs remaining energy and collects spent abrasive and water for recycling.
Evolution and Key Milestones
1930s – The Paper Patents Company developed a paper‑metering and cutting machine using a diagonally moving waterjet nozzle.
1958 – Billie Schwacha of North American Aviation demonstrated an ultra‑high‑pressure liquid jet (around 100 000 psi) that could cut high‑strength alloys for the XB‑70 aircraft.
1960s–1970s – Researchers such as Norman Franz, Ray Chadwick and John Olsen refined high‑pressure pumps and developed durable ceramic orifices. Flow Industries’ improvements in 1973 and 1976 made waterjet cutting commercially viable.
1980s – Mohamed Hashish and colleagues introduced the abrasive waterjet process, proving that adding abrasive to the stream allows cutting of hard materials like steel, titanium and glass. By 1989 abrasive waterjet systems were in 24‑hour production cutting titanium parts for aerospace applications.
These advances laid the foundation for today’s CNC waterjet cutters, which support 3‑axis or 5‑axis cutting for complex geometries.
Materials and Applications
Waterjet cutting is renowned for its versatility. Modern systems can cut virtually any material, including metals (steel, stainless steel, aluminum, copper, brass, titanium), non‑metals (glass, ceramics, composites, carbon fiber, foam), stone (granite, marble), plastics (acrylic, polycarbonate, nylon) and laminates. Pure water jets are used for soft materials such as foam, rubber, textiles and food, while abrasive garnet enables machining of hard materials. Waterjet systems handle thicknesses from 0.13 mm (0.005 in) up to around 300 mm (12 in). This wide range makes them ideal for prototyping, architectural features, aerospace components, custom gaskets and artistic inlays. They are often preferred where thermal methods could damage heat‑sensitive materials.
Can a Waterjet Cut Anything?
Although waterjets can cut almost any material, there are exceptions. Tempered glass and reactive metals like magnesium are unsuitable due to risk of shattering or chemical reactions. Fibrous or honeycomb materials can cause the jet to diffuse, leading to poor cuts. Extremely thick workpieces may experience slight loss of precision, especially in the initial pierce. Nonetheless, waterjet cutting remains one of the most flexible machining processes available.
Benefits of Waterjet Cutting
Waterjet technology offers numerous advantages over traditional cutting methods:
No heat‑affected zone (HAZ) – Because the process is cold, it avoids melting or warping and preserves material properties.
Broad material capability – Waterjets can cut metals, plastics, glass, ceramics, stone and composites.
High precision – Tolerances as tight as ±0.005 in (0.127 mm) are achievable. Advanced machines can reach ±0.001 in (0.025 mm). The ability to produce complex shapes and multi‑axis cuts enables intricate designs and detailed parts.
Superior edge quality – A narrow jet produces smooth edges, often eliminating secondary finishing.
No thickness limitation – Waterjet cutting can process thin foils to slabs several hundred millimetres thick.
Minimal waste and no harmful emissions – The narrow kerf reduces material waste, and no toxic fumes or dross are produced. Closed‑loop water recycling systems further reduce environmental impact.
No tool changes – A single nozzle can cut different materials without changing tooling, reducing setup time and costs.
Limitations and Challenges
While versatile, waterjet cutting has some drawbacks:
Slower cutting speed – Compared with laser or plasma cutting, waterjet cutting is generally slower. This can limit throughput in high‑volume production.
Waste management – Abrasive jets produce spent garnet that must be collected and disposed of properly to minimise environmental impact.
Taper and edge defects – The jet tends to create slight taper or barrel effects in thick materials. Modern systems compensate by tilting the nozzle, but conical kerf remains an issue. For very thick materials, surface finish may degrade and require secondary processing.
Material limitations – Waterjet cutting is not suitable for tempered glass or certain reactive metals. Honeycomb or fibrous materials can cause diffusion of the jet.
Energy consumption and noise – High‑pressure pumps consume considerable power, and the process generates noise levels that may exceed 85 dB, requiring hearing protection.
Accuracy, Tolerances and Factors Affecting Precision
Waterjet cutting is widely respected for its precision. Typical cutting tolerance for industrial waterjet systems is 0.002 in (0.05 mm), with advanced machines achieving 0.001 in (0.025 mm). However, accuracy depends on several variables:
Cutting speed – Slower speeds yield better accuracy; faster movements increase tolerance.
Abrasive quality – Uniformly sized, properly graded garnet improves jet stability and precision.
Material thickness – Precision decreases when cutting very thick workpieces, especially during initial piercing.
Machine stability and setup – Proper positioning and rigidity reduce vibrations and kerf deviation.
Operator expertise – Skilled operators adjust parameters to achieve optimal results.
Comparison With Laser and Plasma Cutting
When choosing among cutting technologies, it’s helpful to compare waterjet cutting to laser and plasma. Laser cutting uses a focused beam of light that melts or vaporises material; it is extremely fast (capable of thousands of inches per minute) and precise but limited to thinner materials (typically up to ~30 mm) and produces a heat‑affected zone. Plasma cutting uses a hot plasma arc to melt electrically conductive metals; it is the fastest and cheapest method for medium‑thick steel but lacks precision and cannot cut non‑conductive materials. Waterjet systems offer unmatched material versatility and no HAZ, handle the thickest materials (up to 300 mm) and produce high‑quality edges, but they cut more slowly and require higher investment and consumable costs.
Safety and Environmental Considerations
High‑pressure waterjets can be hazardous if mishandled. The water stream can exceed 60 000 psi, causing serious injury on contact. Abrasive garnet particles pose inhalation risks, and noise levels over 85 dB require hearing protection. Operators should wear appropriate personal protective equipment, receive proper training and ensure that machines are regularly maintained. Slip hazards from water on the floor and electric shock risks from wet equipment must also be mitigated. For environmental compliance, invest in water recycling systems and proper abrasive disposal.
Why Choose BACH INDUSTRY AG
Expertise in waterjet technology – Our engineering team understands the science of high‑pressure pumps, intensifier technology and abrasives. We offer 3‑axis and 5‑axis waterjet cutting solutions with advanced CNC control.
Comprehensive product range – BACH INDUSTRY AG supplies pumps, nozzles, abrasive hoppers, water recycling systems and garnet sand for waterjet cutting. We also provide safety barriers, terrain‑mapping accessories and software for programming complex cuts.
Services and support – In addition to selling machines, we offer precision waterjet cutting services for prototypes and low‑volume production. Our accurate waterjet cutting services achieve tolerances down to ±0.05 mm and are ideal for materials such as stainless steel, titanium, granite and glass.
Regional presence – We ship and sell waterjet machines across Switzerland, Germany, Austria, Liechtenstein, Belgium, and Africa, ensuring rapid response times for installation, spare parts and support. Our local contacts help clients optimise cutting parameters, reduce consumable usage and lower operating costs.
Focus on safety and sustainability – BACH INDUSTRY AG promotes safe operation and environmental stewardship. We offer water recycling and abrasive removal systems, train operators in best practices and supply protective equipment.
Conclusion
Waterjet cutting has evolved from a paper‑cutting technique in the 1930s to a sophisticated manufacturing process capable of cutting almost any material. Its cold cutting nature preserves material properties, while its precision and ability to handle thick or delicate materials make it indispensable for industries ranging from aerospace to architecture. The technique does, however, come with slower cutting speeds and higher operating costs compared with laser or plasma cutting. When evaluating waterjet cutting vs laser cutting or other methods, consider material type, thickness, precision requirements and budget.
BACH INDUSTRY AG combines technical know‑how with a comprehensive product portfolio to deliver high‑performance waterjet solutions. Whether you need a compact 3‑axis system or a multi‑axis industrial machine, our team can help you buy the right equipment, provide installation and training, and support you through the machine’s lifetime. Contact us to learn more about our waterjet cutting solutions, request quotes or arrange demonstrations in Switzerland, Germany, Austria, Liechtenstein, Belgium or Africa.
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