Alright, the correct drill size for 1/4" BSP is 11.8mm
The bottom of the cylinder is actually quite thick. At least 10mm so I think there will be enough threads
I could either fill the cylinder with water and it up, greatly reduced stored energy but still not 100% safe
Or have to buy some fittings (And a very expensive 3000+ psi gauge) to use the grease pump
Dave
How much pressure will this chamber take?
Sorry for the double post but here is a picture of the thickness of the steel cylinder

EDIT: Working from a 12mm hole, at the 1600 psi peak pressure from a 15X mix, there is approx 280 pounds of force which I feel comfortable with
Dave

EDIT: Working from a 12mm hole, at the 1600 psi peak pressure from a 15X mix, there is approx 280 pounds of force which I feel comfortable with
Dave
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The steel is thicker at the neck. Look online for cut away views of high pressure tanks.Dave_424 wrote:Sorry for the double post but here is a picture of the thickness of the steel cylinder
EDIT: Working from a 12mm hole, at the 1600 psi peak pressure from a 15X mix, there is approx 280 pounds of force which I feel comfortable with
Dave
Best of both worlds, the mass of the water propelled by the energy storage of the gas.twizi wrote:gippeto i think he would use water but he would force the water in the tank with air to compress the water
Strange things happen to objects when they meet a thin jet of water being chased out by 3000psi.
That is the hole that I am tapping, I am not worrying about te cylinder walls, Just showing that there is sufficient material to hold the threads safeley
Dave
EDIT: Okay then, I will only use water/grease to pressurise the chamber
Dave
EDIT: Okay then, I will only use water/grease to pressurise the chamber