O ring fit?

[noisecatcher]

I am designing a suppressor while I wait for my form 1 to be returned and I was wondering how to select and cut for an o-ring. Obviously I understand the functional process for cutting a groove in material. My concerns were the depth and width of the groove. I just don't want it to be a pain in the drain to take apart and put back together.

Edited to be a little more clear.

[noisecatcher]

I think I found what I was look for here I'll share it to help the next guy. I probably posed my previous question in an unclear manner.
http://www.applerubber.com/oring-gland- ... arch-field

[SilentMike]

What size O-ring are you looking at? Is it an internal or external application?

Mike

[Pineapple Devil]

What are you looking to achieve by using an o-ring? If you're trying to use it to help secure a mount or end cap to the tube, numerous people have tried and they always end up melting so they gave up.

[noisecatcher]

The oring would be like a piston ring really just to keep gas from leaking out of a monocore the link above let me plug in the numbers I had and see how they matched up with stock o-rings. I really need to start posting pictures with my questions.

[T-Rex]

I usually factor a fit of 5% the o-ring diameter (per side, sometimes depending on application).
So, for a .065 o-ring, I'll undersized the total ID by .003. You can start at ID -.006 and open it up if it feels too tight.

Material selection, for the o-ring, can play a part in the necessary tolerances as well. Some flex and squish more/less than others. You don't want some materials moving too much or they will wear-out quicker. Same goes for putting too much stress on a harder material.

[SilentMike]

Visit the McMaster Carr website and search under "viton O-ring". They have a chart with the advertised dimensions versus actual dimensions. For instance, an O-ring that is 5/8" I.D. x 1/16" thick is not actually 5/8" (.625") I.D. x 3/4" (.750") O.D.. That O-ring actually measures .614" I.D. x .754" O.D..