Frequently Asked Questions

About Waterjet Cutting:
Q: Which materials can be cut with Waterjet ?
A: Without any classification of hardness all materials around the world can be cut by Waterjet.
Q: What is the pressure level of Waterjet pumps?
A: Usually they designed for 4000 bars but since 2008 6000 bar pumps has started to be manufactured.
Q: What is the maximum thickness that can be cut?
A: For material such as steel, glass, marble it is possible to cut upto to a thickness of 200mm. With 6000bar systems this has been increased upto 300 mm.
Q: Do we need to start cutting from the edge? Or can we start with piercing?
A: With Waterjet , for every material, it is possible to start with piercing as it is possible to start from egde as well.
Q: How thick is the cutting kerf when cutting with Waterjet?
A: In Waterjet cutting, pure water cutting kerf – depending on the water nozzle being used – can be from 0.1 mm to 0.25 mm , abrasive cutting kerf  would be from 0,55  ,   0,76   or   1,1 mm .
Q: How about the relation of Waterjet  with the environment?
A: Waterjet only causes phisical particle polution. The polutant is only a mixture of water, sand and cut material.
Q: Cutting every material , can Waterjet be a better alternative to laser and plasma?
A: If you can a material with a method other than Waterjet, then this method would be for sure cheaper compared to Waterjet Cutting. Waterjet cutting is a slow and therefore an expensive cuting method.  It is only used when there is no more alternative.
Q: In which cases Waterjet is the only possible cutting method?
A: Only materials that melt or burn can be cut with thermal cutting methods. However, since with waterjet cuts with phisical etching, materials which do not melt or burn  or composites of materials with different melting temperatures and charateristics can be cut without any problem.
Q: Is precise cutting possible with Waterjet ?
A: Waterjet beam has an accuracy of 0.1 mm, under these conditions even if the machine is accurate enough, an accuracy level better than 0.1mm cannot be guaranteed.
Q: Is the cut edge of the Waterjet cut material perpendicular (90°) to the surface, if not what would be angle?
A: The waterjet beam coming out of the nozzle is not cylindirical. It is more like a cone with a 1° apical angle. However, the cutting section shape is related to the cutting speed. Beginning with higher speed cutting section shape changes from V form to A from by decreasing speed. Thus , it is possible to find the ideal speed where the cutting edge will be perpendicular to the surface.
Q: Is it necessary to change pressure, nozzle diameter , abrasive type or amount according to the material to be cut?
A: Since it is always aimed to cut with highest possible speed, pressure , nozzle diameter and abrasive amount is adjusted to maximum values. Then the only variable parameter is the speed which depends on the material, hardness and thickness.
Q: Can a pump work with more than one heads?
A: Yes, depending on the pump flow rate (power) and the diameter of water orifice used in the heads, one pump can feed more than one heads.
Q: Can one pump feed more than one machines?
A: If material to be cut is marble , granite or glass with which piercing must start with low pressure, since the same pressure will apply the both machines at the same time, more machines cannot be fed with single pump.
For cases that low pressure piercing is not necessary,  depending on the pump flow rate (power) and the diameter of water orifice used , one pump can feed more than one machines.
Q: Can the water and abrasive be reused?
A: No, they cannot be reused because water has become more corrosive and the sand particles are smaller in size.