Re: PO BOY Water Jetter ????

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@...>
wrote:

>
>
> > Hi Ken,
> >
> > The device you may be interested in is known as a maximator.
> >
> > Its a liquid pump that that is driven by an air compressor. They

come

> > in a variety of ranges and operate on 1 to 10 bar air pressure

input

> > and can produce liquid pressures upto 75000 psi or 5500 bar

output.

> > Perfect for making a waterjet cutter. Best thing about them is

that

> > they are a fairly small unit and could possibly be mounted direct

to

> > a z axis.
> >
> > Hope that helps.
> >
> > Regards, Rob
> >
>
> Sounds very interesting but one thing to check would be the flow
> rates, you could get some very high pressures with a big pneumatic
> cylinder driving a very small "syringe" but you wouldn't get much
> flow. So I guess the question would be can they produced the

desired

> pressures when there is a small opening in the system (the nozzle).
>
> Graham
>

Hi Graham,

Maximator are a German company. They have an offshoot that produces a
commercial waterjet cutting system. The systems are based on the
pressure units their main company produces. I have seen pictures of
the nozzle its roughly 3 to 4" long and has a stone of some
description with a .3mm hole mounted in the end. This attaches
directly to the pump from what i can remember. I will try and dig up
some more info.

I remember all this from quite a few years ago as i was talking with
some cad guys at a local engineering firm that do work in the oil and
gas industry here in New Zealand. I happened to mention that i was
looking to build a waterjet cutting head.

One of the pumps i did see had a outlet pressure rating of 65000 psi
and weighed 13kg with a flow rate of around .4litres/min

Pretty impressive for a little pump.

Regards, Rob