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Small Diameter Woes

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Small Diameter Woes

Unread postAuthor: goose_man » Sat Apr 21, 2007 12:43 am

Hey, I was looking into making a gun to shoot 1/4" ball bearings, and I wanted to use another breech loading ball valve like I did here: http://www.spudfiles.com/forums/cool-new-pneumatic-t7443.html.

Only problem is that to do so, I would need a 1/4" PVC ball valve with socket-weld connection on at least one side. McMaster-Carr only sells ones that small with threading on both sides. Anyone know where I could get the kind I'm looking for?

Also, since I would be using another thin brass barrel sleeved inside 1/4" Schedule 80 PVC, I could, perhaps, just let the brass tube go through the male fitting. To know if this would work, without wasting cash that is, I would need to know the ID at the smallest part of a 1/4" male threaded adapter. It would have to be equal to, or larger than, the ID of 1/4" Schedule 80 PVC (0.282"). Anyone know?

Thanks in advance!

-goose_man
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Unread postAuthor: chaos » Sat Apr 21, 2007 1:02 am

maybe drill out on side then sleeve coupler in and weld it in to the drilled out side of the ball valve, then weld that on to whatever.
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Unread postAuthor: hi » Sat Apr 21, 2007 1:13 am

you can buy a metal valve and attach a slipxthreaded adapter.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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