Call us now for a quote
01983 404997

Our guarantee to you

1. Your expectations of quality will be met in the service we provide

2. Your orders will be delivered on time

3. Your orders will be cut from quality approved materials, where we have supplied the material

4. You will receive a service tailored to your requirements

5. Your information will remain confidential

Waterjet Cutting - How Does It Work?

Waterjets are fast, flexible and accurate. They use the technology of high-pressure water being forced through a small hole (typically called the "orifice" or "jewel") to concentrate an extreme amount of energy in a small area. The restriction of the tiny orifice creates high pressure and a high-velocity jet.

Pure waterjets use the jet of water exiting the orifice to cut  material,  like thin soft rubber  or  foam, but are not effective for cutting harder materials.

The inlet water for a pure waterjet is pressurized to  between 20,000 and 94,000 Pounds Per Square Inch (PSI) (1300 to 6000 bar).   Industry  standard  waterjets  usually operate  at  50 to 60,000  PSI.  This water  is forced through a tiny hole in the jewel, which is typically 0.25 to 0.4 mm  (10 – 15 thou)  in diameter This creates a very high-velocity, very thin beam of water  travelling faster than the speed of sound approaching  Mach  4    (about 2,400 mph or 3800 km/hr)  for  94,000  PSI. As the pressure goes up the stream velocity increases, delivering greater cutting power density.

An abrasive jet starts out the same as a pure waterjet. As the thin stream of water leaves the jewel,  abrasive (usually garnet, a substance commonly used on sandpaper) is added to the  stream and mixes. The beam of water accelerates abrasive particles to speeds fast enough to cut through much harder materials.  The  resultant  jet  travels through a  tube  ( referred to as a mixing tube or focussing tube)  and  forms a  cutting  jet  usually  between 0.9 – 1.2mm  diameter.  Abrasive constitutes 2/3 of the machine operating cost, and as pressure goes up, the stream moves faster and becomes smaller in diameter.  Less abrasive is then entrained into the stream, but each particle carries more momentum and cutting power.   Waterjet is commonly used to refer to both types of  jet  ( pure water  &  abrasivejet)

94,000 psi rated pumps vs. 60,000 psi rated pumps:

1. Cuts 30-50% faster

2. Uses 30-50% less abrasive

3. Delivers 20-30% lower part cost

Abrasive jet in  action  cutting  30mm thick  GRP

Waterjet vs. Plasma vs. Laser vs. EDM







high speed

Burning / melting
process using high
temperature ionized
gas arc

laser light beam 

process using electrical


 Any material.

Primarily steel,
stainless steel and

Primarily steel,
stainless and

Can also cut a
limited variety
of other materials.  

materials only.  


Up to 24 inches,
virtually any

Z constraint
is only
limit to thickness.

Up to 2-3 inches,
depending on

Generally 1 inch
or less,

Generally 12
inch or less.


 Up to .025mm

  Up to .25mm

  Up to .025mm

  Up to .00


£90k to over

£90k to
over £350k    

£250K to
over £1.4M

£150k to
over £500k


Same setup
for all

setup for
different jobs

Different gases
and parameters
for different jobs

wire types for
different jobs

<< Back to Technical