SpudFiles

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

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

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

The steel is thicker at the neck. Look online for cut away views of high pressure tanks.

twizi wrote:gippeto i think he would use water but he would force the water in the tank with air to compress the water

Best of both worlds, the mass of the water propelled by the energy storage of the gas.

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