Pressure flush system fluid

[clowdis]

For those of you that use a pressure flushing system for chambering, what brand of fluid do you use? What I'm using is allowing the reamer to "squeal" when it gets about 2/3 of the way into the chamber. It's not a "chatter" because the chamber is still smooth. It seems like the reamer is just too tight in the chamber and it starts squealing. If I go back to my old method of using cutting oil and withdrawing every .100 or so then the reamer works fine so I'm thinking it must be the cooling/machining fluid that I'm pumping through the bore.

 

[Rustystud]

Blair:

Is it the reamer or the pilot squeeling?

Nat

 

[clowdis]

Nat,
It's the reamer. I removed the pilot to see if it would make a difference and it didn't.
Blair

 

[Rustystud]

Blair:

I am using Rustlick 255R cut 3:1 with distilled water. I am using a Shertec 1/2 hp gear head pump pushing the coolant down the barrel accross the reamer at 35 -125 psi. I am using a snug pilot and feed is pretty heavy .100" about every 15-20 secconds. I back out .100 and flush with 75-125 psi.
Nat

 

[clowdis]

Nat,
I'm using Trim, an alcohol based coolant. I went up on the concentration and up on the RPM to 255 and it seemed to help. I got a little reamer squeal just before finishing the chamber. (That didn't sound just right did it)?

 

[jscandale]

Can anyone make a good recommendation for a pump/motor combination to use for a flush system? When I look for a pump, it is always just the pump with no motor. Seems like a oil furnace pump would work, maybe a small hydraulic pump would work too.
Any suggestions?

Thanks,
JS

 

[Rustystud]

MSC sells 3/8", 1/2 hp, Bronze Close Coupled Carbonator Gear pump with a relief valve. The part number is 09390774, and it cost $399.66 in the 2009-2010 catalogue. I have built 6 Flush systems for myself and others using this motor and pump. Know it works and works well.
Nat Lambeth

 

[jscandale]

Now that's what I am looking for!
Thanks Nat!

In the last 2 days or so, I came to the realization that I also have a hydraulic pump motor with an attached reservoir for a MEC 9000 hydramatic shotsshell reloading press that is not in use. Shot shells are cheaper to buy these days.

Whatcha think? Think it should work?
Also, I would imagine that the filter needs to be in line from the pump to the bbl right? Is there any reason for a gear pump over an impeller type?

Thanks,
JS

 

[Rustystud]

Will it pump 4-6 gallons per minute at 125 psi? I have a ball valves to control my flow and pressure. I use a whole house water filter (2-5 micron filter). I have a pressure gauge for regulating the constant pressure. I use a series of more balvalves and have a air hoses connect for cleaning out the lines. I go from rigid iron pipe to flexible hydrolic line and use a Duff Norton Rotary coupler to connect to the barrel muzzle. I am running Rustlic 255R extreme presure coolant/lubricant. I chamber with a constant flow of 35 to 50 psi. I flush with 75-100 psi.
Nat Lambeth

 

[jscandale]

I see, other than the rotary coupling, what do you use to connect the flush hose to the end of the muzzle? Is it some kind of compression coupling that has rubber rings that squeeze the outside of the bbl?

Thanks for the info,

JS

 

[Rustystud]

I use the "KISS Principle" Heater hose and clamps.
Nat Lambeth

 

[jscandale]

Nat,
Stupid question...
What is the reason for increasing the pressure on the flush, just to insure that you blow out all of the chips? Also, why the lower pressure on the chambering cycle, just too much splashing?

Thanks,
JS

 

[clowdis]

I use the "KISS Principle" Heater hose and clamps.
Nat Lambeth

After all this high dollar stuff with the pump and all, you end up attaching with a piece of heater hose and band clamp!! Tch, tch!!

 

[Rustystud]

Blair:

I made a step down adapter for the Duff Norton coupler: and bought different sized pieces of hose and clamps. It works well until it blows of the end of the barrel. Then you have a real mess.

I made a couple of high tech 60 degree couplers and they all leaked and were cumbersome.

Have used heater hose for 10 years now and never looked back.

Nat

 

[jscandale]

Nat,

Do you use some type of rubber cone that fits in the muzzle, or just clamp on the hose and go? Also, I checked the flow of that MEC hydraulic pump and I'm as lucky as can be. I think it's gonna work like a charm.

Thanks,

JS

 

[clowdis]

Can anyone make a good recommendation for a pump/motor combination to use for a flush system? When I look for a pump, it is always just the pump with no motor. Seems like a oil furnace pump would work, maybe a small hydraulic pump would work too.
Any suggestions?

Thanks,
JS

Do you have a coolant pumping system on your lathe? That's what I'm using along with Greg Tannel's flush system hookup. It works well but doesn't have the pressure of Nat's system. It'll flush the chips but you have to back the reamer off occasionally.

 

[jscandale]

I gave that some consideration, but I would like to retain the coolant system in tact for the purposes of cooling exclusively during deep drilling and cutoff operations where hot tools cause problems.

I did come up with a great solution that was under my nose the whole time. The hydraulic pump that I will be using will deliver up to 200 lb of pressure. I can just limit the flow with a ball valve like Nat said. The best thing is that it's a all in one contained unit. I'll just have to incorporate a larger reservoir for additional cutting oil.

JS

 

[Rustystud]

Willis Fowler in his book uses an electric drill and one of those plastic pumps that hooks in the drill chuck. He pushes black pipe threading oil out of a 5 gallon pail.

Choose your poison there are many ways t skin the cat. I like no temperature, little to no tool wear, and I can't stand screeming reamers. I have a 95 Palma reamer and a 6mmBR reamer both with over 2000 chambers cut with them and never been reground.
Nat

 

[clowdis]

Another point Jon is the return system. You'll have to rig up something from the chip pan back to the pump sump diverting flow from the lathe coolant system pump. That's one of the reasons I decided to just use the lathe coolant pumping system instead of an auxiliary system. I just unscrew the coolant system line above the ballcock and attach the flush system. I don't cut as many chambers as Nat but I have never had a reamer resharpened either.

 

[jscandale]

I had an idea for that. I am going to use a magnetic parts tray just like this one on top of the cross slide between the tailstock and chuck with a drain hose directed back to the oil reservoir. It will also act as a chip gatherer due to the magnets. It should work well, I'll post it here.

JS