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Piston not working good

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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Piston not working good

Unread postAuthor: turkeypig666 » Wed Mar 21, 2012 7:37 pm

hey guys, I just finished my airgun and Last night it didn't work at 80 psi, but today it worked at 145, but I re-tryed it at 100 and it doesn't work, air leaks in the barrel, Anyone know what could be wrong? I'm guessing it's my piece of crap piston. Thanks!
Don't mind my chamber, I'm just testing.

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Unread postAuthor: Fnord » Wed Mar 21, 2012 7:59 pm

The problem is most likely the piston. You'll want one that fits snugly, has a clean, squared-up sealing face and is not a marshmallow.
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Unread postAuthor: turkeypig666 » Wed Mar 21, 2012 8:21 pm

Thanks for the reply, I laughed so hard at your post. I think I will build with a threaded shaft, some washers and o-ring.s. what kind of o-rings do you use? Thanks! :D
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Unread postAuthor: mattyzip77 » Wed Mar 21, 2012 9:53 pm

Use a rubber sanding drum as a piston you can get them at harbor freight for cheap money, they havnt failed me yet at over hundreds of shots!
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 22, 2012 3:25 am

Fnord wrote:You'll want one that fits snugly, has a clean, squared-up sealing face and is not a marshmallow.


HAHAHAHAHAHA!!!!

:lol:

cheers, needed that genuine lol this morning :)
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