GTA
Airguns by Make and Model => Air Arms Airguns => Topic started by: shooter r on February 17, 2022, 03:54:48 PM
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Does anyone know the size (mm probably) and hardness of the AA TX200 breech seals. I plan on buying a bag from "the Oring Store". They're Orings and two are needed. AA replacements start at around $8 for the pair! I want to replace them whenever my cocking arm develops a little play. Thanks.
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Go for the O Ring Store size 108. They give the properties of the various materials. Go for ones with less memory. I do not store my gun with the cocking lever closed in order not to hold my breech seal compressed all the time.
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They are indeed BS108. ID 6.02mm, OD 11.26mm, thickness 2.62mm.
I made some one piece TX200 seals from 90A SHORE polyurethane, and they both worked and lasted well, so if you can get 90A SHORE o rings, they should do fine.
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I use the o-rings offered by Air Rifle Headquarters. They seem to last a real long time.
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Posting for future reference.
Thanks!
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Go for the O Ring Store size 108. They give the properties of the various materials. Go for ones with less memory. I do not store my gun with the cocking lever closed in order not to hold my breech seal compressed all the time.
Tom by “less memory” do you mean those with a higher durometer number?
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Inside this post is a picture of the orings which I am using. I have like 50 lifetimes worth lol, but they are cheap ordering from here. I am currently running a soft oring underneath a high durometer, my thought is the hard seal will wear better against the breech, and the soft seal below will still let the stack up compress.
https://www.gatewaytoairguns.org/GTA/index.php?topic=167022.0 (https://www.gatewaytoairguns.org/GTA/index.php?topic=167022.0)
Jason