Chamber flush system pressure ?

[GenePoole]

thx for the replies. If I can not get a spring to work at the pressure/flow that I want can I just add a bypass? thanks

Yes, that should work fine.

 

[Jayson]

thanks very much

 

[Ggmac]

A little late but I used air pressure over the fluid , I had two outlets one below , in the fluid and one above in the air , with the reamer still in I would stop the flow and turn the valve for a shot of air .
Of course the air was at 90-100 and the fluid pressure was about 40 , depending on temp .
It worked but since I retired I've not used it , I think it got reconverted to a sandblaster !

 

[Rustystud]

There are several variables First, caliber size. I use a water soluble coolant and the height of the rifling to the bushing is less in smaller calibers. Therefore I run higher pressures to increase the volume. In large calibers I run higher pressures due to the ease of flow due to the increased volume. Second, I change the RPMs with different size calibers and case size. Small calibers are run at 50 RPMs, Mid size calibers are run at 70-125 RPMs. Large calibers are run from 125- 250 RPMs. I ream most calibers at 35-45 PSI in .100" then back out .100" and flush and 75-124 PSI. Once the reamer shoulders flutes are cutting I withdraw the reamer when I am about .250" from finished depth. I check the reamer for chip weld and finish the chamber. I have chambers more than 10,000 chambers in the last 50 years. I have been using a flush system for approximately the last 20 years.

 

[Hal]

Rustystud

Thanks for sharing your knowledge.

Hal

 

[Walt Krafft]

I use a normal coolant pump so it is not much pressure. But enough to make a mess. I use a Castrol full synthetic water soluable fluid. Clear and doesnt stink. It is important to have the reamers set up for through coolant. I let the reamer tell me when to clear chips. You can feel it.

 

[GenePoole]

Water-based coolant has a lot lower viscosity and provides much more flow through the system and therefore can operate at lower pressures, but as waltcrafft said, you need to ensure that enough fluid can get to the cutting surfaces of the reamer. Reamer manufacturers will make reamers with a wire clip instead of a screw for bushing attachment, but if you already have an assortment of latter, you can modify the screw with a die grinder to allow sufficient coolant flow around it as so: