The best type of material to use as a piston?

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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Brian the brain
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Whatever caused it...it would be better to have a little more clearance to prevent it and have O-rings to overcome the issue.

It is a blast to lathe or shape on a drill and pretty tough.
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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stuffbuilder
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Whatever you do stay away from wood. There's no way to machine it to the point where it won't leak around the O-rings
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Crna Legija
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stuffbuilder wrote:Whatever you do stay away from wood. There's no way to machine it to the point where it won't leak around the O-rings
wood works just fine, you just have to seal the wood with pea glue or varnish to stop it swelling and binding
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jsefcik
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mattyzip77 wrote:Jessie are you serious?? Why would you re post that??
was a mistake,

And BTB cleaned up the mess.. :D
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Gun Freak
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mattyzip77
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Gun Freak wrote:Twas not a mistake...
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stuffbuilder
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wood works just fine, you just have to seal the wood with pea glue or varnish to stop it swelling and binding
Its not that the wood swelled up and jammed (it was varnished), but rather the O-ring groove could not be machined fine enough to make a good enough seal
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Technician1002
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Use glossy enamel paint to seal the wood pores and leave a smooth finish on the grooves.
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