O'ring Database.....What I'm doing.

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Dirte

Dirte

Member
May 21, 2016
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Washington, United States
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As I mentioned in other posts and dovetails with this topic http://www.airgunnation.com/topic/tools-and-such/#post-218239,

If you have a PCP.....It will eventually produce a leak! So I have been trying to get a large stock of o'rings. Metric o'rings have far more sizes than the US standard o'ring counterparts. I think at this stage I have every o'ring for every gun I own. Still I come across one that may be a variant from overseas low power to US high power.

The following is just my theory.... Some airgun companies make it fuzzy what size the gun uses. Perhaps to protect and sell their own part number. This is fine but when a gun becomes a big seller, the information will get out. So it comes down to..... Do you want a customer with information, or make some extra money on parts. I don't blame them for either. I don't think any of these companies/dealers are getting rich fast. Another thought is, maybe they want the correct o'ring to be placed into their gun. We are dealing with a high pressure vessel! Some companies even go the route of supplying extra rings with the new gun. Well enough of my .02 cents. 

The fourth picture down is a great o'ring spec reference. https://www.marcorubber.com/o-ring-size-chart-index.htm 
A few standard will cross reference to metric. Since we don't have a good measuring device for MM o'rings besides a set of calipers, we can get a "sort of close" idea and look at the chart size. This generally gets enough information to get the correct size.

One of the most asked questions on this forum is "What size o'ring for this spot". The good thing is that more people that have a good reference sheet for their gun, they can share it to help out a fellow airgunner. I wish we had a database section on this forum. We have a lot of information on here it is just hard to find. But either way, we do have this forum which is great. It is just the nature of the beast. Airguns can be cantankerous but they sure are fun. It is also fun to bounce off questions and answers with other enthusiasts. It beats posting my vacation photos on Facebook that nobody else cares about.
 
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I have taken a page from Dirte's playbook and am amassing the o-ring charts for the various guns I own and have ordered the needed o-rings. I was just ordering as I needed them, but with this last order I should have all the o-rings to repair all my guns. Depending on the size, they come in lots of 25 - 50 for about $2.50. They are not that expensive. I had to pay Huma $20, including shipping and VAT, for 10 in their rebuild kit to rebuild my regulator on my R10. They would not tell me the sizes I needed.
 
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Very nice, kudos to you. Up until these last two years, I never kept rifles long enough for the orings to wear out. But recently I've settled into a core group of about 4 rifles plus one other that can rotate through for curiosity/experimentation purposes. And sure enough, had leaks develop this year on both my Edgun and Colibri so had to deal with that for the first time. Then the orings on the Edgun mags gave out shortly after - easy fix.

Just last week, the orings on the kalibrgun/cricket/Colibri fill probe started leaking...and none of the orings I have on hand are the right size. Does anyone know the proper size for this fill probe?

thx
 
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I do have a small contingent of o-rings in stock like the breach o-rings, and a smattering of others. But unless you have an environmentally-controll place to store them, all too often they're no good when you need them the most! So it pays to buy the best in o-ring materials, and stock just what you might need with proper turnover as well. 
 
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To the original poster people here have been or will be dealing with O Rings. My marauder is down until I can find a shop with the fine grit ball hone. I can assemble the thing ad be good for months then it decides to not hold air. Its always a clipped oring. I have had two goes at chamfering the openings but am down to the ball hone as a last chance. Thanks for the tip AJ.
 
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GQ's photo.

AZSTRIPPER does any one have a list of part # from a co. like orings and more for a complete set of o rings for a FX impact
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Here is what I used for my .25 (o'rings and more). Also this is a thread that I was able to get them from. The pic is missing an X-ring I know of. It is referred to in the thread. Hope this helps. http://www.airgunnation.com/topic/fx-impact-schematic-and-list-of-orings/

I can try to get a clearer list, but it will be next week before I can get it.
 
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