This depth can determined by the formula O*(100%-S%) - 1/2(OD - ID) Where O is O-ring thickness, S% is the percent of squeeze (higher percents make tighter O-ring seals), OD is the outside diameter of the interior part, and ID is the inside diameter of the exterior sleeve.
Logically, this seemed to make sense to me. However, I still was unable to determine how to choose which size of o-ring to use. Could someone perhaps provide some insight regarding this issue?
I have a specific case as well. I have a 1.25" x 12" cylinder of 6061-T6 aluminum stock, and a piece of aluminum tubing with an OD of 1.25" and an ID of 1.12". If I wanted to machine the stock into a piston and a bulkhead, how much should I turn the stock down and what size o-ring should I use?
Also, if anyone has any other information regarding lathe processes, it would be greatly appreciated. I am sure that if I paid the money for the premium content on <a href="mini-lathe.com">mini-lathe.com</a>, but I would rather not.