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Pistons for pneumatics?....

A place to ask general spud cannon related questions.
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Pistons for pneumatics?....

Unread postAuthor: metabolicmaggot » Fri Jun 09, 2006 4:00 pm

Can someone give me a bunch of good ideas for pistons?

I know I want my design to have a piston, but I'm just looking for the best way to do it.
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Unread postAuthor: Benny » Fri Jun 09, 2006 4:37 pm

what sise piston do you want......
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Unread postAuthor: metabolicmaggot » Sat Jun 10, 2006 12:13 pm

I was hoping for 2.5" but then I thought I would go with the spudzooka design which is 1.5", so I'll just take what ever the best design is.
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Unread postAuthor: )DEMON( » Sat Jun 10, 2006 12:21 pm

How about an end cap?How much work are you planning to do on the piston?
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Last edited by )DEMON( on Sat Aug 05, 2006 3:40 am, edited 1 time in total.
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Unread postAuthor: djt » Sat Jun 10, 2006 1:28 pm

i made a 1.5 inch piston out of epoxy the other day for my coaxil piston. the gun is drying now so i cant tell you how well it worked yet but i just put a piece of 1.5 inch pvc the lenth i want my piston to be on a sheet of rubber and filled with epoxy. after it dried i cut the mold off, sanded it so it fit in the pipe and bolted on the rubber.
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Unread postAuthor: Atlantis » Sat Jun 10, 2006 10:38 pm

Would that foam that hardens work if you made it in a mold?

My friend's dad broke one of those today while we were there and he held the hole closed and threw it outside, the can was completely encased in a mountain of foam.
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Unread postAuthor: spudkpi » Wed Aug 02, 2006 11:45 pm

I created an endcap piston today from a neoprene washer backed with hotglue disc and bolted to an encap but it slowly leaks into the barrel... any suggestions? The piston is 2'' and uses a 1-1/4'' endcap.
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Unread postAuthor: L.J.R » Sat Aug 05, 2006 3:36 am

Would that foam that hardens work if you made it in a mold?

My friend's dad broke one of those today while we were there and he held the hole closed and threw it outside, the can was completely encased in a mountain of foam.




It's called expander foam where I live I believe it is too soft and light, but I have never made a piston.[/code]
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Unread postAuthor: Brian the brain » Sat Aug 05, 2006 6:00 am

Just use a long bolt and some washers and nuts.

I---I <--like that
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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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Unread postAuthor: MrCrowley » Sat Aug 05, 2006 6:12 am

Im using a metal can slightly longer then a Pringles can but alot stronger so i might stick a bolt through to hold the rubber on and fill the can with foam :D are 3"tees expensive?and i need a 3"bushing into a GB size barrel which may be hard to find.
And last thing do all parts need to be sch40?
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Unread postAuthor: noname » Sat Aug 05, 2006 11:23 am

Or SCH 80.
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Unread postAuthor: MrCrowley » Sat Aug 05, 2006 4:11 pm

Or SCH 120.

WTF how did you get away with your post noname it says mine is to short
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Unread postAuthor: Velocity » Sat Aug 05, 2006 4:40 pm

or metal
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Unread postAuthor: MrCrowley » Sat Aug 05, 2006 6:00 pm

Doesn't it say your post is too short?or does this just happen to me?
Hard to find a metal 3" Tee :D
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Unread postAuthor: noname » Sat Aug 05, 2006 10:19 pm

I put spaces after. :D
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