interseting.......
you speak my language! hell ya! haha... im a quality technician.... measuring machined parts is my life....
starting off.... lets use standard measurments? ....for my sake... tehe...
coversion-
gasket - 0.0435
gap between barrel and head - 0.0420
runnout on your head - 0.0000078701
for starters, the runnout on your head has gota be wrong? otherwise you have some nasa measuring equipment iv never seen...lol... but seriously, how did you measure that?
any chance you can find out what your runnout is on the jug, alone? i would have to agrea that the flatness of the head is well withing a reasonable tolerence, if your measurment was correct? i am however curious how you are measuring the gap between the two? are you using a feeler gauge? if so, and you came up with a varience of 0.042, then the recomended gasket would only allow for 15 ten thousandths of crush. this sounds failry close to what might be required. my guess is, your gona end up with anywhere from 100 psi to 200 psi. the thickness of your desired gasket, should be in direct relation to its durometer. many people think it has to do with surface area... this is not true! ... my machinery standards handbook for list some general gasket information, and notes some rules of thumb. among these rules it states, "The minimum squeeze for all seals, regardless of crosssection should be about .2 mm (.007 inches)". your current gap, and gasket recomendations are withing the, "minumum". do you have a hardness tester for duro at your facility? if so, i should be able to calculate very near the desired thickness of the gasket with this measurment.
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