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Best source for Orings?

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RangerPete View Drop Down
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    Posted: 06 Oct 2024 at 9:55pm
Hi Folks,

Any suggestions of where the best place is to source Orings from?
Specifically the little ones for breech/probe seal for PCP’s.

Thanks,
Pete.
Walk quietly, but carry a big stick.
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Pauly5 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 7:40am
If you know the size and material then Seal Imports Ltd.  There's a branch here in Wgtn, plus another crowd called Pacific seals.

I get the feeli ng breech ones are slightly harder. Typical seals are "70" breech might be "90".
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RangerPete Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 9:08am
Cool thanks.
I know nothing about Orings.
Can’t believe I’ve been playing with PCP’s for so long and so far have never needed to change an Oring!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 9:11am
To measure use OD x thickness of O ring.
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nunga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 7:21pm
just to clarify pauly's post. it is the OD of the part that the oring goes around you need to measure not the OD of the oring itself.

I normally use as a guild .5mm  for compression.

Another thing to take note is metric v imperial. Metric orings always are 2.0 3.0 4.0 ect...imperial orings are always 2.5 3.5 4.5 ect.. in thickness. so it is best to take the oring off. measure the thickness and the height of the oring and you can work out what it is from there as orings do go out of shape due to the compression they are under.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 7:58pm
Having said all that. You should now know how to identify the type of oring you have. You can now find the size oring you need. You can go here https://deltaflex.com/home/products/seals-%26-o-rings/o-rings and find the size you are after. Then go look at bunnings or mita 10 and have a look at their oring kits they have. if you cant find the size you are after try NZ seal services in onehunga auckland. I used to work there back in the day. I was their service manager. They will have the oring you are after.




Edited by nunga - 07 Oct 2024 at 7:58pm
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nunga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 8:04pm
Oh and if you can tell me the size i probably have one here i can send to you anyway :)
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RangerPete View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RangerPete Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2024 at 9:11pm
Thanks Nunga, all good info.

The breach of my .22 wildcat is puffing slightly. Still accurate and usable, but I suspect after a few thousand pellets, it’s probably time to replace it anyway.
Before I try and dig it out and probably damage it before I can measure it, I’ll try find the correct size on an exploded FX barrel diagram somewhere 🤔
They try source some.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct 2024 at 12:27am
A tip for replacing it is to get a wooden dowel (5 mm) push it in from muzzle end up to O ring groove, then push O ring in. It'll stop it going past the groove and seat it.

And Nunga is quite right, my apologies I always get that wrong. Now let me work on that gun for you. Tongue
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