Coolant Through Lathe Tooling Pressure

[MountaineerMiner]

At what pressure do through coolant external lathe tool holders start to be worth the hassle? Or are they not worth the hassle?

 

[Orange Vise]

200-300 psi is good.

Particularly useful if you get any birds nesting. Not necessarily to prevent the birds nest from happening (it's not that simple), but to prevent the birds nest from completely blocking coolant flow.

 

[Ox]

Like apparently most others (lack of reply's) I don't understand the question.


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Think Snow Eh!
Ox

 

[crossthread82]

@Ox I think he's asking how many psi his through turret coolant pressure needs to be in order for a through coolant turning tool to be worth the extra expense.

 

[Ox]

Are we talking about a 3/16" drill?
Or a 1.25" indexable drill / boring bar?


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Think Snow Eh!
Ox

 

[wmpy]

Are we talking about a 3/16" drill?
Or a 1.25" indexable drill / boring bar?


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Think Snow Eh!
Ox

The OP says external holder. So, one of those stick holders with the coolant internally routed to the tip.

 

[SND]

I heard 1000psi with through tool can make a big difference in high temp alloys, but I never got to try it myself. I only have 145psi.
Thing is, many coolants will just foam at these pressures.
I have a through tool parting holder/blade but I never even used it yet, shouldn't have bought it in the first place. 300psi+ would probably be better for that anyhow.

 

[CarbideBob]

Two uses here.
One is to get some coolant in when things ball up or get in the way (birdnest) 40 PSI works here.

Other is to break chips that one can't break otherwise or have the wrong chipbreaker in the tool.
Here you need a lot of targeted force and need 1000 to 3500 psi.
Bob

 

[MountaineerMiner]

Thanks guys, that is exactly what I was looking for. I am only running flood and wash down pumps right now. Currently I route boring bars and indexable drills if they have coolant passages. Even with the low pressure it seams to help.

I am happy to hear some are reporting gains with moderate pressure and not full 1000psi+ systems only. I don’t have a desire to go to a setup like that right now but was considering a booster pump.

For clarity, I was referring to all the external through coolant holders, such as parting blades, external threading, and general turning.

Thanks,
Mike

 

[Blaser Swisslube]

High pressure coolant is almost always desirable. In regards to if it is worth the hassle...that depends on if improved tool life is the goal. If better tool life is needed, then high pressure coolant is the way to go.