Wanted info
Printed From: Kiwi Airgunners
Category: For Sale / Wanted
Forum Name: Wanted
Forum Description: Are wanting to buy something? try in here first
URL: www.kiwiairgunners.co.nz/forum_posts.asp?TID=843
Printed Date: 10 Dec 2025 at 3:34pm
Software Version: Web Wiz Forums 10.14 - http://www.webwizforums.com
Topic: Wanted info
Posted By: Stuart
Subject: Wanted info
Date Posted: 05 Jul 2023 at 5:52am
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I’m after breech seals for TX200/ Prosport anyone know specifications and where to get them please. Vitron and Nitrile have been suggested. Stu |
Replies:
Posted By: Stuart
Date Posted: 05 Jul 2023 at 6:07am
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BS108. ID 6.02mm, OD 11.26mm, thickness 2.62mm. Just noticed specs on line and suggested shore hardness for bottom one 75 And top one of 90 vitron Cheer’s I will see who has them. |
Posted By: Pauly5
Date Posted: 06 Jul 2023 at 1:31am
| I have 2 spare from memory, but would need to check. If you can't get one let me know. |
Posted By: Stuart
Date Posted: 06 Jul 2023 at 3:29am
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Hello Paul Thanks for that offer, I should be ok a pretty standard size and available in Christchurch. Existing one gone hard and cracking. Also doing piston extension with o’ring instead of standard seal And the spring guide was as loose as so making new one of them and hopefully should reduce the bit of buzz. Cheer’s Stu |
Posted By: jwabfrog
Date Posted: 06 Jul 2023 at 7:40am
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Multiple seal options if you want to buy online from offshore: http://vortekproducts.com/ourstore/AirArms_Piston_Seal https://www.airrifleheadquarters.com/catalog/item/251485/1390459.htm https://www.customairseals.com/product/air-arms-tx200-pro-sport-breech-seal/ https://twchambers.co.uk/airgun-spares/air-arms/pro-sport/or002-breech-seal-set-of-2/ https://spares.bagnallandkirkwood.co.uk/product/2-x-upgraded-air-arms-tx200-prosport-breech-seals/ I've ordered from, custom air seals, bagnall and TWC with good service from each in the past |
Posted By: Pauly5
Date Posted: 07 Jul 2023 at 3:00am
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Sounds like a good project there Stu. I'd be keen to see photo's of the O ring piston seal if you can be bothered. will you make it out of aluminium?
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Posted By: Stuart
Date Posted: 08 Jul 2023 at 3:46pm
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Turning all the bits up next week so will show photos when it’s about to go back together. Just got O’rings coming down from Wellywood so will see how it goes. Keep you posted. Parts less than $20 just an hour or two machining. Using existing spring, would have liked original but will see how it shoots The spring guide in it now is very loose so next one should improve the buzz. |
Posted By: Stuart
Date Posted: 08 Jul 2023 at 3:48pm
| Thanks for all the info |
Posted By: Pauly5
Date Posted: 08 Jul 2023 at 4:38pm
I turned up a top hat and guide for an HW80 out of delrin, and it was like it had snowed around the lathe with the amount you take off. 
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Posted By: Stuart
Date Posted: 09 Jul 2023 at 6:36am
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I’m using molybdenum impregnated Nylatron for all parts with viton o’ring on extension. Give it a whirl eh! Someone over in uk has done one and has had good success with it so more or less copying his work After 4 years of using its still working good,so all being well will be less than just buying new seal. Fingers crossed. |
Posted By: Stuart
Date Posted: 09 Jul 2023 at 6:38am
| You don’t get anything thing out if you don’t put the work in. |
Posted By: Stuart
Date Posted: 13 Jul 2023 at 10:59am
| Turned all the parts and will show pics as I install tomorrow. |
Posted By: Stuart
Date Posted: 14 Jul 2023 at 12:06pm
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Just got finished and Prosport is much better no spring twang as with the old loose spring guide Turned a nice tight one up in Nylatron as are the piston extension and top hat, a slight radius was required on Seal undercut to allow fitting of the extension also needed 4 slots to allow expanding to fit a good tap with My tapometer so this is a nice tight fit. A bit stringy to turn but pleased with results and new seals now a lot cheaper and easy to change. New breech o’rings aswell. The spring isn’t standard so would like to get one as this one seems a bit strong but Will see how it goes 31coils. Hello I will get some photos on. Shimmed side play in trigger now much better Piston extension 17.5mm Copied what a UK guy did but used existing undercut and didn’t need to use securing screws. https://nbroadsman.me.uk/index.php/air-rifles/air-arms-tx200-hc-tuning |
Posted By: Pauly5
Date Posted: 14 Jul 2023 at 1:10pm
| Looking forward to seeing them. |
Posted By: Stuart
Date Posted: 14 Jul 2023 at 1:27pm
I don’t seem to have permission to load photos   
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Posted By: Pauly5
Date Posted: 14 Jul 2023 at 2:20pm
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I had a look and can't see any restrictions on your profile. Maybe Nunga will check, he knows heaps more about it. I can see you have a couple of images uploaded, but can't see them or when you uploaded them. |
Posted By: kruzaroad
Date Posted: 14 Jul 2023 at 2:52pm
| Showimg up on my ph. |
Posted By: Stuart
Date Posted: 14 Jul 2023 at 2:54pm
| Yep all good now thanks. |
Posted By: Pauly5
Date Posted: 14 Jul 2023 at 3:26pm
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There ya go. I'll be interesting to see how the O ring setup goes for you. Good work! Would a quick blast of heat get rid of the stringy bits? Where did you buy that material from?
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Posted By: Stuart
Date Posted: 15 Jul 2023 at 6:27am
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Offcut of 30dia x 150mm Nylatron from LEP Plastics Chch $10 O’rings Pacific seals Wellington total of 6 for piston and breech 2 sets of each for spares total $7 Nylatron specs The closest to Oilon Nylon is Nylatron GSM which is specifically formulated with a molybdenum disulfide (MoS2) additive. This additive provides enhanced strength, rigidity, and self-lubricating properties to the material. The presence of MoS2 particles helps to reduce friction and wear, making Nylatron GSM well-suited for applications involving sliding or rotating parts. Guy in Uk been using his setup for about 3 years with no trouble at all with extension and theViton o’ring So I will have to get out and do some shooting and see how mine goes. |
Posted By: Stuart
Date Posted: 17 Jul 2023 at 6:13am
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Zero’d at 16yards shooting very smooth then target at 35 yards 6 shots 10 mm crs with jsb 10.3 shown in photo. Haven’t got a crono but pellet drop suggests 12.1 ft/lb sorry got that wrong about 11.2 I expect that this might increase slightly as gun settles in. Pleased with the mods done a much nicer feel. |