Waterjet FAQs

Learn everything you need to know about waterjets, Pioneer in waterjet cutting machine technology. Shreeji Waterjet Cutting Services – Mumbai is here to serve you better quality cutting of your material. Waterjet can save your time, material & money.

1.What is waterjet cutting?

The term WaterJet Cutting encompasses two procedures: “WaterJet Cutting” and “Abrasive Cutting”. The two methods are relative, the former using pure water pressurised to 60,000psi and forced through a jewel with an aperture of around 0.1mm and the latter, Abrasive cutting, differing in its incorporation of an abrasive in to the water the moment before it hits the material (in this case we use Garnet, a very hard and sharp sand.) The combination of pressure and abrasive quickly scores through the material with a kerf (cut width) of between 0.8-1mm depending on the thickness of the material.

WaterJet Cutting and Abrasive Cutting are extreme forms of erosion; artificial imitations of naturally occurring aquatic processes. The best example of such forces (and a process identical to WaterJet Cutting) can be seen in the geological formation of waterfalls whereby a combination of fast flowing water and fine particles wear away the rocks, gouging deep canyon styled features into the earth’s surface.

In somewhat smaller contexts WaterJet Cutting uses just a couple of litres of water and a couple of hundred grams of Garnet (abrasive sand) per minute, forcing them through a nozzle of 0.8 at 2045mph (that’s 3 times the speed of sound).

2.Uses of Waterjet Cutting (Areas of Application)

Industries:

Initially, WaterJet cutting technologies were adopted mainly by aviation and space industries. However due to the versatility of WaterJet cutting, scores of industries have now adopted the technology, some of which include:
  • Nuclear Industries and Power Generation
  • Tile Cutting and Interior Design
  • Job shops
  • Shipyards
  • Aerospace
  • Automotive Manufacture and Repair
  • Heavy Engineering
  • Stone Cutting, Landscaping
  • Military and Defence
  • Artistic & Architectural
  • Food Cutting
  • Glass Cutting / Metal Artwork
  • Foam Products / Gaskets
  • Medical / Surgical
  • Construction and interior decoration industries
  • Metals cutting, exotic & nontraditional materials
3.Advantages of Waterjet Cutting

  • Classified as a “green technology”, WaterJet cutting is 100% non toxic and recyclable. Water, the main waste product, can be safely returned to circulation and the abrasive sand, collected from the tank via a pump, can be either disposed of at landfill or recycled and reused. The process is also completely odourless and dust free.
  • No HAZ (Heat Affected Zone). WaterJet cutting is a cold process eliminating any chance of distortion or tempering of the material by large amounts of heat.
  • No mechanical stresses. The only pressure on the material is directly underneath the abrasive WaterJet beam.
  • Thick Materials. Most WaterJet machines can cut up to 200mm thick. At Yorkshire Profiles we limit our machine to 150mm as we often find cutting materials thicker than this results in a cut deviation which is often unacceptable.
  • Multi-stacking. Thinner materials can be stacked on top of each other to reduce the time of cutting identical parts. This allows us to offer extremely competitive prices for large quantity orders whilst ultimately maintaining our top quality standards.
  • Tight nesting for efficient material use. As the kerf (cutting width) is narrow and there is no heat distortion, parts can be nested tightly together to get the most out of the material.
  • No secondary operations required. With most materials no burr is left and the cut edge has a smooth satin/sandblasted finish.
  • Cutting of reflective, pre-printed, coated materials or materials of poor quality. Unlike laser cutting process, WaterJets are indiscriminate of the materials they cut.
  • Common line cutting. This means that a straight edge of one part can double up as the straight edge of another part. This reduces the time of manufacture as the WaterJet can produce two parts with one cut.
  • 4.Limitations / Materials can not cut with Waterjet Cutting

  • Toughened glass cannot be cut by this process, it will merely shatter.
  • WaterJet cutting is a slower process than laser cutting service however this can be reduced through multi-stacking techniques.
  • 5.What is 'Micro - Tagging'?

    If a part is fairly small, it is necessary to add a ‘micro-tag’ to hold the part in place whilst the material is being removed from the machine. The tag stops that part from falling into the tank. Sometimes this leaves a small pip about 0.7mm big on the part which is can usually be removed with a small file.

    6.What is ' cut daviation' / ' taper cut' ?

    This effect is often seen in thicker materials which have been WaterJet cut. As the beam is traveling through the material it is slightly compressed. This results in a very slight taper on the cut edge and is a characteristic of all WaterJet cutting. The deviation is usually about 0.1mm from the top of the material to the bottom depending on the material thickness and the speed at which the part was cut.

    7.What is the sheet size capacity at Shreeji Waterjet Cutting Services?

    Our abrasive waterjet machines can handle material up to 2500 mm (width) X 9000 mm (length)