In the world of industrial manufacturing, two cutting technologies stand out over all others – water jet cutting and laser cutting. Both are precise, versatile, reliable, and operate within a similar price range. Still, there’s a subtle yet notable difference between laser cutting and waterjet cutting in terms of the specific advantages they offer relative to different applications.
That said, the question of the day is how and when to choose between water jet cutting and laser cutting. Another question that goes hand in hand is which one of these two machine-cutting methods is superior.
In this article, we aim to immerse you in the world of these two cutting methods, comparing their cost, speed, precision, and materials so that you can pick the best one for your needs.
Water Jet Cutting: The Power of High-Pressure Water
Let’s start at the beginning by answering briefly what is waterjet cutting. Essentially, it’s a subtractive manufacturing process that uses a high-velocity stream of water to erode a given material. This process is similar to how natural wonders like the Grand Canyon were formed but performed in a more controlled manner and on a much smaller scale.
The water cuts the material by eroding it but doesn’t leave uneven edges due to the huge pressure caused by manipulating the nozzle. Sometimes, the water contains abrasives like sand or garnet to enhance its cutting properties. All in all, water jet cutting is a versatile method that you can use to cut a wide range of materials, including metal, stainless steel, stone, tile, rubber, foam, and cloth.
So, is waterjet cutting dangerous? Well, the process itself isn’t that dangerous, but safety risks can arise if you’re not following proper precautions, such as operator training and equipment maintenance.
Benefits of Waterjet Cutting
One of the key benefits of waterjet cutting is its ability to handle thick materials. This is one aspect where it’s notably different from laser cutting, which may struggle with materials over 1″ thick. Water jet cutting can effortlessly cut through materials several inches thick.
Stacking is a method of cutting with a waterjet machine that involves placing several layers of the material on top of each other before commencing the process. This makes it an ideal choice for applications that require heavy-duty cutting, such as aerospace and automotive industries.
Water jet cutting is also known for its precision. In this regard, it may not match the laser’s accuracy, but water jet cutting can still achieve tight tolerances. You can use the method to carve out complex shapes and forms in different materials with relative ease.
The cutting speeds of water jet cutting typically range from 1 to 20 inches per minute, depending on the material and thickness, which makes it fast and precise. Speed is a key aspect of the process, not just from a performance standpoint but also from a financial one.
Laser Cutting: Harnessing the Power of Light
Laser cutting, on the other hand, relies on the power of highly concentrated light to cut through materials. The laser beam focuses on a small spot and heats the material to the point of either melting or vaporization.
Advantages of Laser Cutting
Regarding speed, laser cutting gets the nod over water jet cutting. Laser cutters can operate at speeds ranging from 20 to 70 inches per minute, making them significantly faster than water jet cutters. This speed advantage makes laser cutting a preferred choice for applications that require quick turnaround times.
Another notable advantage of laser cutting is its ability to cut extremely thin materials with exceptional precision. You can achieve a minimum cutting slit size of 0.15 mm with a laser cutter, making them ideal for cutting parts that demand intricate details and fine cuts.
Also, laser cutting produces a smaller kerf, the amount of material you need to remove during the cutting process constantly. This results in less material waste and positively affects overall cost.
Cost Comparison: Water Jet Cutting vs Laser Cutting
When it comes to making the crucial decision between the cost of a water jet or laser cutting, several factors come into play. Initially, the equipment cost for a laser cutting machine is generally lower compared to water jet cutting machines, but that depends a lot on the type of cutter you need or want.
In the long run, waterjet machines make a lot more sense financially, primarily due to the overall operating costs and the minimal waste and environmental impact at the end of the process. Whether it’s wire EDM vs waterjet cutter or picking between a laser and water jet machine, the cost will ultimately be directly influenced by the type of materials and specific purposes you have in terms of machine cutters.
Namely, the cost per cut varies depending on the specific application. Water jet cutting can have increased operating costs in cases where you need to add abrasive materials to cut through sturdier materials. Laser cutters, on the other hand, require intricate ventilation systems to remove fumes that accumulate during the cutting process. Also, more precise machines like fiber lasers are significantly more expensive than CO2 laser cutters.
When you start to put together a water jet vs laser cutting cost analysis, begin by calculating the production volume and selecting the type of materials, you’ll be cutting. Laser cutting is often more cost-effective for thin materials and high-volume production, while water jet cutting takes the center spot when you need to deal with thicker materials and at lower production volumes.
Comparing Speed and Precision: Laser Cutting vs Water Jet
Both water jet cutting and laser cutting have their strengths and weaknesses in terms of speed and precision. Water jet cutting can achieve high precision, but it still lags a bit behind the precision properties of laser cutting. A water jet erodes the material, resulting in lower tolerance, but it’s more forgiving when it comes to thicker materials, as it doesn’t introduce heat.
Laser cutting is exceptionally precise, particularly when you’re cutting through thin materials. The small diameter of the laser beam provides high tolerances and helps make small and direct cuts. As material thickness increases, though, laser cutting becomes less reliable, as the heat involved in the process creates heat-affected zones, which may lead to material distortion or slag.
Speed-wise, laser cutting is faster than water jet cutting, with operating speeds of up to 70 inches per minute as opposed to water jet cutters’ 1 to 20 inches per minute. The material’s thickness dictates the cutting process’s speed, and waterjet cutting becomes a better choice when thicker and more resilient materials are the target.
Which Method is More Suitable for a Specific Material?
Deciding on a machine cutter, be it a laser, water jet, or plasma cutter, is ultimately settled by the type of material you need to cut. When you need versatility, it’s better to turn toward water jet cutting. The method can help you cut through a variety of materials with ease, including cutting metal, stone, wood, tiles, rubber, foam, and cloth. It’s particularly well-suited for thick materials that may pose challenges for laser cutting.
Laser cutting, on the other hand, fits thin materials better. It can effortlessly cut materials like wood, acrylic, leather, and thin metals. Also, while lasers provide excellent precision, they introduce heat into the process, which can affect the outcome.
Water Jet Cutting vs Laser Cutting – The Verdict
As much as we’d like to provide a clear verdict, the jury is hung on this particular matter. This matchup has no winner simply because both cutting methods offer unique advantages and are suitable for different applications. The choice ultimately depends on material thickness, precision requirements, production volume, and budget.
Keep an open mind when trying to select, as sometimes, a combination of both water jet cutting and laser cutting may be the best solution. To settle the water jet cutting vs laser cutting debate, turning to experts who offer cutting services for help is a smart choice. Doing so lets you make an informed decision and ensure that your cutting process is efficient, precise, and cost-effective.
FAQs
1. Is water jet cutting better than laser?
Waterjet cutting is more versatile and can cut thicker materials, but laser cutting is more precise. The correct answer is based on your particular needs.
2. Is waterjet cutting dangerous?
Possibly, but only if you do not handle the machine correctly. Generally, it’s perfectly safe when you follow proper safety protocols.
3. Can waterjet cut 3D?
Yes, with the latest technological advancements, waterjet systems can now perform 3D cutting using specialized heads.