WATERJET FAQ

A&V Waterjet Tech Inc. offers new waterjet cutting machines starting with $40K only. A middle line of product typically goes from $120,000. We can certainly meet your customization needs. Please contact us for a free and no obligation quotation.

80% of world’s abasivejet waterjets have kerfs around ±0.003 inch or looser. Others may have kerfs around ±0.0005inch to ±0.001. With Waterjet technology, the tolerances will be sharper.

Underwater waterjet cutting reduces the noise to under 75dB and eliminates material frosting within 1/16″ from the jet. T he downside of this process is you need water level control on your catcher in order to see the underwater cutting process. Without the control, you need to work underwater and handle the cutting process.

Operators cut up to 8-inch steel and titanium in production. There have been cases where 12″ and even 15″ thick materials have been cut. However, majority of cutting from operators ranges from 1/4″ to 2″.

Garnet is by far the most commonly used abrasive material. It is abundant, cheap, enhances cutting speed, increases tube life and reduces health hazards. Other abrasives include olivine sand, aluminum oxide, and some man-made materials

Waterjets cuts at 90,000psi. It is also the maximum intensifier pump pressure. Although higher pressures can result in higher maintenance cost on intensifier pumps especially on the seals, the result is higher cutting speed and efficiency.

Each 0.010″ orifice uses 0.5 gpm.
Each 0.013″ orifice uses 0.82 gpm
Each 0.016″ orifice uses 1.24 gpm

You need to replace the high pressure seal after 400 to 1200 hours of usage on a 55,000 psi intensifier and replace the seal after 200 to 600 hours of usage on a regular pump.

In most waterjet systems 36 inches of water in the catchers dissipates the energy of the jet.

You can expect hundreds of hours of production time from the support grating before the need to replacing it. We recommend that, as long as you don’t cut just one pattern over the same section for thousands of parts, slats and grates can be shifted, swapped, and flipped just as with plasma and laser cutting. Thus, this will extend the life of the grating supports.

The highest quality ceramic carbide mixing tubes last 30% longer than other mixing tubes. A tube such as this can deliver 150 hours of cutting time for 0.020″ in diameter. Many users keep the mixing tubes longer and use them to cut parts which require looser tolerances.

For the most efficient cutting, cutting heads on a 55,000 psi intensifier use:
0.010/0.030     0.9 lb/min
0.014/0.040     1.4 lb/min
0.018/0.050     2.5 lb/min

A&V Waterjets are relatively easy to program as compare to any other waterjet cutting system. Our professional PC based waterjet software is capable of reading any 2D DXF files. Programming for abrasive waterjets is quick and easy. An operator with little experience should be able to learn how to program and operate the machine within one week.

Since the force exerted on the workpiece is very small (under 1 lb. for precision cuts and under 5 lbs. for average cuts), the need for very large and stiff fixtures is eliminated. Many customers use simple weights to hold the parts in place.

Hourly machine cost ranges from $19 per hour for the small head (0.010/0.030) and up to $35 per hour for the large head (0.016/0.040). It does not include labor, lease, and depreciation.

Abrasive will cost between $0.16 per pound to $0.40 per pound delivered, depending on the type and quantity you purchase.

Neither water nor garnet are toxic or hazardous in any way. Water, when properly filtered for turbidity, can be flush down to the drainage systems. The garnet waste can usually be dumped in a standard landfill.

It is clean water. Most of our customers use softened tap water. Intensifier pumps should be supplied with filter cartridges that clean the water down to 0.5 micron. De-ionized or reverse osmosis systems are generally not recommended. These types of systems can make the water too clean, which makes the water aggressive and harmful to the pump.

Recycling systems are available. However, because waterjet systems use a small amount of water it is not economically viable for most users.