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floating O-ring piston

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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floating O-ring piston

Unread postAuthor: ilovefire » Tue Dec 14, 2010 10:05 pm

hey this is a floating O-ring piston i made for an 8mm coaxial pneumatic
the piston is made of a section of 8mm ID aluminium tube with epoxy coating and end plugs (in the photo it is just aluminium foil, but is going to be the filler) sealing face is attached with a screw and an O-ring for the check valve, fits 13mm ID chamber, tell me what you think, questions are welcome
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P1140823.jpg
O-ring channel, lightly machined on a drill
P1140822.jpg
back of piston
P1140819.jpg
front of piston
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Unread postAuthor: Lockednloaded » Tue Dec 14, 2010 10:06 pm

did you make the oring groove with a hand drill?
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Unread postAuthor: ilovefire » Tue Dec 14, 2010 10:15 pm

Lockednloaded wrote:did you make the oring groove with a hand drill?


yea, the epoxy part was easy and i only hat to take like 1/2mm of the aluminum tube so it wasnt that hard, just a little awkward
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Unread postAuthor: jackssmirkingrevenge » Tue Dec 14, 2010 11:50 pm

Very nice, is this for the cane gun?
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Unread postAuthor: ilovefire » Wed Dec 15, 2010 12:01 am

jackssmirkingrevenge wrote:Very nice, is this for the cane gun?


thank you, no this is for a shotgun stile launcher, still waiting for the shop to get the right sizes pipe for the cane gun :(
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Last edited by ilovefire on Wed Dec 15, 2010 1:35 am, edited 1 time in total.
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Unread postAuthor: jackssmirkingrevenge » Wed Dec 15, 2010 12:15 am

ilovefire wrote:the cain gun :(


Will you be using it toblow the bloody doors off :D
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Unread postAuthor: Gippeto » Wed Dec 15, 2010 1:12 am

I think some body's been paying attention. A simple yet surprisingly effective way to control internal flow of the valve. :)

Should work very well, but the porting in the groove is larger than it needs to be.

Yer gonna like the way it works. :wink:
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Unread postAuthor: ilovefire » Wed Dec 15, 2010 1:44 am

jackssmirkingrevenge wrote:
ilovefire wrote:the cain gun :(


Will you be using it toblow the bloody doors off :D


ha ha ha, edited to fix spelling mistake

Gippeto wrote:I think some body's been paying attention. A simple yet surprisingly effective way to control internal flow of the valve. :)

Should work very well, but the porting in the groove is larger than it needs to be.

Yer gonna like the way it works. :wink:


yea well i thought i would give something like that a go because i found a O-ring that was almost a perfect fit, but the funny thing is i didnt even use it i bought a better one :lol:
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