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Oils for marker??

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Shadowminion View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shadowminion Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2007 at 5:59am

the first orings were made of rubber ...

Buna is now the most commercially available and cheapest material for orings , so its a safe bet most applications using orings are of Buna-n material unless there's a reason for some other material being used .

For the rest of your questions ,,, Read on my good man !! 

SL68-II , micro honed and polished .688" bore . Tuff Enuf .
Widowmaker , under construction
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tallen702 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tallen702 Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2007 at 11:22am
Someone used to make teflon coated o-rings for tanks to supposedly help seal better. I haven't seen them for some time.
<Removed overly wide sig. Tsk, you know better.>
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Bruce A. Frank View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce A. Frank Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2007 at 11:34am

Originally posted by TIPPY98ACT TIPPY98ACT wrote:

Hey Bruce and shadowminion, thanks for opening my eyes! Last night at work I went into the shop and found one of our copies of the McMaster-Carr catalog. I read the o-ring explanation section and found that most o-rings are not effected by oil based lubricants. Go figure? My question is what type of o-ring do you guys think Tippmann uses in their guns? I found that Buna-n is one of the most widely used o-rings for it's ability to resist petroleum-based oils, hydraulic fluid and non-aromatic solvents. It has high abrasion resistance. Also temperature range is from -65 to +275 degrees Fahrenheit. Sounds like something you would want in a paintball gun right? Then I read on and found Viton and Polyurethane, Neoprene, Kalrez, Teflon, Silicone and even Ecapsulated o-rings. Most have the features you would want to have and some that you don't! So what one do you think they put in the guns? I really want to know what you guys think? On a fun note, I asked ten different people on my shift (ages between 30 to 54) what they thought about petroleum based lubes on rubber and plastic and they all suggested it was a bad idea! Where do think this theory came from?

Buna-N and Neoprene are the two most commonly available in the kits I have.

What is really funny about your "survey" is that "O" rings were originally developed to seal petroleum oils in equipment and engines. 

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Bruce A. Frank View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bruce A. Frank Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2007 at 11:38am
Originally posted by tallen702 tallen702 wrote:

Someone used to make teflon coated o-rings for tanks to supposedly help seal better. I haven't seen them for some time.
It was/is a solution for which there was no problem. Teflon works well in some reactive atmospheres, like high pressure oxygen. It also improves resistance to strong acids, but the need for these relative expensive coated "O" rings is limited because there are other materials that offer equal performance in most situations.
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