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AR15.COM
4/5/2017 4:53:13 PM EDT
I am currently using  couple of Buna-330 orings to maintain tension between two cylinders that move an inch or so away from each other and back.
As O-rings aren't designed for this type of application, what would be a more suitable material to use? Nitrile? Silicone?
Thanks in advanced for suggestions.
4/5/2017 6:26:59 PM EDT
[#1]
Would a compression spring work?

4/5/2017 6:31:40 PM EDT
[#2]
Oil seal

4/5/2017 7:39:41 PM EDT
[#3]
A Teflon oring?