Pneumatic piston?

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
acs2997
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Thu Jan 03, 2013 7:36 pm

Has anyone tried making a piston that pushes when pressurized and retracts when the pressure is relieved? I was thinking of integrating one into my gun, but i want to know the practicality of it before spending (more) money on making one.
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matti
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Thu Jan 03, 2013 7:53 pm

Could you be a little more specific on what part of the cannon you mean, valve or loading system or what piston ?
acs2997
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Thu Jan 03, 2013 7:56 pm

reloading system, not as a valve. I mean one that is completely sealed that acts just as a hydrolic piston
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matti
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Thu Jan 03, 2013 8:06 pm

Not sure how are you going to integrate it, but cant you use small pneumatic cylinder for that ? they make ones just like you described
acs2997
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Thu Jan 03, 2013 8:13 pm

how much do they sell for?
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matti
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Thu Jan 03, 2013 8:20 pm

You can find cheap ones from ebay, or local scrap metal yards that sell all kinds of stuff.. I have many cylinders that i bought at about 2-5euros each.

From what you have described I would think that you should look for single acting cylinders.. opens with pressure and returns with spring.
acs2997
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Thu Jan 03, 2013 8:21 pm

thanks! that saves me the stuggle of making my own!
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CS
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Thu Jan 03, 2013 10:22 pm

Single acting:
https://www.surpluscenter.com/sort.asp? ... yword=ACSA

Double acting:
https://www.surpluscenter.com/sort.asp? ... yword=ACDA

Check eBay of course, but these guys sell them pretty cheap.
acs2997
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Thu Jan 03, 2013 10:28 pm

Thank you so much! these websites are perfect! To be honest, I hate eBay. I've never had a good experience with them. This seems perfect. I'm sure I can find one to use.
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