What size O ring do I need? Where do you buy them?
Nick is using a 1/8" I.D. x 1/4" O.D. x 1/16" thick o-ring. I picked up a few of these today and it does look as if they will be the easiest to install/remove. The ones I had were actually too large for easy installation, but It would compress and worked very well.
I have been trying to educate myself on o-rings, I didn't realize how many different types of material these are made out of. There are at least 8 different materials stocked by this vendor. They have different temperature ranges and range in price from $1.88 for 100 to $37.37 for 1.
Holy smokes, that one must go on the Space Shuttle or to NASA.
In this application, I would expect to replace mine every 25 shots or so. IF those el-cheapo $1.88 for 100 pieces ones hold up that long, that would only add about 2 cents to a blowback free range session. I will be ordering a few different types for experimentation. No matter how you look at it most of these are way cheaper than the leaky old primer carriers. I am also sure that there may be different life expectancies of the different materials when used in their intended application, our application is a torture test of heat/pressure/time, the three ingredients to erosion failure. We will eventually figure out the best material for this purpose, and it may indeed be one of the less expensive shoices, or the 2 cent per piecce ones for that matter.
If anyone knows wht material would be best for this torture we are putting them through, please speak up.
Check these out, you can get more information by clicking on the type you want to check out. It will give you the intended temperature ranges. Of course we are exceeding that, but we can just change it out after it is shot out for just pennies. Also check the quantity. Let me know what you guys think.
http://www1.mscdirect.com/CGI/N2DRVSH?PACACHE=000000084731608