Quick connect coupling question

[sharpshooter11000]

Does anyone know how I could remove the valve inside a quick connect coupling that stops air flow when the coupling is disconnected? Should I just drill it out? Thanks

[Gun Freak]

I've got one out with a hammer, just hit straight through with the threaded side down. Take some needle nose pliers and get the spring out of the way first if you can.

[sharpshooter11000]

Thanks I'm trying to make a ballistic knife a bit like JSR's but that runs off 12g CO2 cartriges

[Gippeto]

Edit: DON"T use compressor type quick connects with un-regged co2...they are NOT designed for that kind of pressure.


Might want to check your state laws regarding these devices before you begin. IIRC, possession of a air or spring powered ballistic knife can lead to jail time in some states.

Better to check first...than be sorry later.

[MrCrowley]

Most quick connects can be unthreaded and dismantled.

Pull back the sleeve and remove the steel ring that stops the sleeve being pushed too far forward. I then stuck the hexagon end of the quick connect (that is for a spanner to grip and tighten when threading) in a vice and used a plumbing wrench to grip to the small area now exposed at the front of the quick connect when the sleeve is pulled back and where the ring once was to unthread the quick connect and remove the spring and seal. It may seem like quick connects can't unthread but you have to think "how did they assemble this without threading it together?" and you'll soon find a way to unthread it.

[sharpshooter11000]

Thanks guys. And Gippeto I live in the UK so this mightn't be such a good idea... JSR made one though and I read somewhere that he lives in the UK.
Anyway, what pressure is un-regged CO2 usually at? I think I might just use compressed air at about 200 psi if I end up making it.

[MrCrowley]

JSR made one though and I read somewhere that he lives in the UK.
Anyway, what pressure is un-regged CO2 usually at? I think I might just use compressed air at about 200 psi if i end up making it.

I can tell you he doesn't live in the UK.
Unregged CO2 is generally at around 800PSI depending on the temperature.

[sharpshooter11000]

Ah ok then. My quick connects definitely won't handle that, they're rated for 200 PSI. I don't think I'll end up making it, firearms laws are pretty tight here Hmmm I think I know where he lives

[MrCrowley]

I think some people have used them at 500PSI but only when they were already connected and also not disconnecting them at that pressure. So don't think they would be safe for this particular build.

[sharpshooter11000]

I might make a lower pressure sorta thing just for fun with compressed air. Thanks for your help

[Gun Freak]

QCs in the US can't be dismantled in the manner described by Crowley, at least mine can't.

[Lockednloaded]

really? mine can and I get them from homedepot. just grab the hexagonal part with one wrench and the part above the sleeve with the other.

[MrCrowley]

Mine is made by a manufacturer in Germany but I bought it in America

They're available in NZ as well.

Maybe it just seems like you can't dismantle them in the same manner, it took quite a lot of effort to get in to unthread.

[Gun Freak]

Alright I'll check it out tomorrow.

[mark.f]

I actually made a short write up on doing exactly what OP is asking... wait a tic...

http://www.spudfiles.com/forums/viewtop ... tml#247242