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Where to find a rubber disc?

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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Where to find a rubber disc?

Unread postAuthor: gwoloshyn » Sat Sep 15, 2007 8:09 pm

Does anyone have an online source for rubber discs I can use for a piston valve? Any help appreciated. thanks
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Unread postAuthor: trae08 » Sat Sep 15, 2007 8:13 pm

depends.. where do you live? like country wise...
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Unread postAuthor: shud_b_rite » Sat Sep 15, 2007 8:15 pm

Use an old mousepad
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Airbeds... so many different uses
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Unread postAuthor: noob of noobs » Sat Sep 15, 2007 8:21 pm

Mouse pads are okay, but some are pourous. I'm trying a broken bike tube, and it's working out fine.
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Unread postAuthor: Marco321 » Sat Sep 15, 2007 8:25 pm

noob of noobs wrote:Mouse pads are okay, but some are pourous. I'm trying a broken bike tube, and it's working out fine.


I use inner tube as well, its very good and cheap
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Unread postAuthor: trae08 » Sat Sep 15, 2007 8:27 pm

my home depot sell rubber end caps for pvc in sizes from 4 inch to 1 inch i think. cut the sides off an they work great.
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Unread postAuthor: gwoloshyn » Sat Sep 15, 2007 8:29 pm

thanks for all the ideas!
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Unread postAuthor: jackssmirkingrevenge » Sat Sep 15, 2007 9:49 pm

truck tyre inner tube, manage to find one and it'll last you many, many spudguns :)
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Unread postAuthor: Panzerfaust » Sat Sep 15, 2007 9:59 pm

Lowes sells rubber washers in sizes up to 2 1/4", they do have holes in the middle though for bolts. I have been really impressed with Lowes lately, they now carry street elbows and (da da da dum) even more recently they started carrying 2 foot sections of pressure rated 3" and 4" pipe. No fittings yet though....
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Unread postAuthor: gwoloshyn » Sat Sep 15, 2007 10:48 pm

Yes, ive noticed the 2 foot sections of pipe, i think its because home depot does that too. good for us!
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Unread postAuthor: Rudesill Ballistics » Mon Sep 17, 2007 3:15 pm

I've used a material called Foamie, available at most craft stores.

Make sure you get the 3mm kind, it will be smoother. The larger is more porous because they pump more air into the mix.

I glued it to the piston with Goop.
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Unread postAuthor: goose_man » Mon Sep 17, 2007 3:52 pm

I use neoprene washers from Lowe's.

Does anyone know where to buy thick sheet rubber (like 1/4" - 1/2")? I've tried two different art stores and lots of hardware stores.
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Unread postAuthor: locksmith » Mon Sep 17, 2007 4:10 pm

Vehicle parts store you can go buy radial tire patches in various sizes they are a lot stronger than inner tube matierial
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