Oxygen cylinder mortar

[schutzen]

Does anyone have plans or details on how to construct a bowling ball mortar from an oxygen cylinder?

[GGaskill]

Depends on what type of cylinder you have.  If it is the typical light weight cylinder used for welding gases, you need to make a separate thick wall powder chamber and mate it to the cylinder after cutting off an appropriate amount of the neck.

If you get one of the truly high pressure cylinders with the 3/4 to 1" thick walls, you can pretty much just bore it out a little to fit and go from there.

[firebuckeye]

Would the 2200 psi  large O2 cylinders, known as "H" cylinders be consider high pressure and suitable?  Just curious I may have access to some.

[GGaskill]

I don't know what the internal diameter of an H cylinder is.  A bowling ball needs a minimum of 8 5/8" diameter ID.  If the wall thickness of an H is about 1/4", it would be OK for the upper part of a mortar if the diameter is OK.  You would have to build a thickwall powder chamber and attach that to the gas cylinder.