Is high pressure coolant necessary?

[RMW]

Anyone run a QTN 250MSY?
Do you recommend the high pressure coolant(213 PSI)
or is the standard (25PSI/ 8GPM) good enough?
Is it worth the $3,000 ?
I want to make sure there is coolant at the tool without having a delay.


Thanks.

[G0G90]

I'm not certain what a QTN 250MSY is however, High Pressure Coolant has MANY benifits.
Better finishes, longer tool life, shorter cycle times, ... etc.

The largest drawback from any High Pressure coolant system is the filteration. You'll also need a little more preventative / proactive maintenance.

However, I do need to ask; who is telling you that 213psi is considered "high pressure"? AND, if you're used to working with pressures under 50psi, what are you cutting and cutting with?

[fordav11]

high pressure coolant is the ducks nuts
I regularly drill holes with Sandvik 805 drills and ejector drills over 20" deep and high pressure coolant is an absolute must, as are correct speeds and feeds. You really only need it if you are drilling deep holes and you must use drills with through-coolant. The definition of 'Deep' can vary depending on your drill diameter. For example drilling a 12 inch deep hole with a 3" drill is not difficult with normal pressure coolant. But you would certainly need high pressure coolant if you were drilling deeper or if the material was harder or not good chipping material, like stainless, inconel etc. Drilling a 1/4" hole more than 4" deep is also difficult without higher pressure. It also depends on how many parts you need to drill. If you have 5 parts just peck the holes and move onto the next job. If you have 10000 parts the high pressure coolant will pay for itself on the first day.
I've found the filtration is done by the high pressure unit so not usually a problem. The only problem with high pressure coolant is it tends to piss out of every little gap or hole in the entire machine
So you may need to plug holes when they appear or you end up with a messy floor.

[underthetire]

25 psi? That's not even low pressure, that's 1985 pressure. 250 is low pressure. Now is it worth 3k? Kinda expensive I think, unless it comes with filtration, and if it's like our sy mazak, it doesn't. A. 225 psi pump from grainger will run you about 600, and a new overload about 100. The higher the pressure, especially on a lathe, the better.
Now, if you want to see some major changes, buy a cool jet 1000 psi unit. That's a real medium pressure unit.