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Solid Rubber Pistons.

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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Solid Rubber Pistons.

Unread postAuthor: Mitchza89 » Sun Dec 09, 2007 9:23 pm

Well lads,

Looks like I've fixed the constant problem thats plagued me since I first got into small bore high pressure guns, the sealing face always coming off. I went to a place in Brisbane called Clark Rubber and bought a few rubber door stop thingo's. They were in a cone shape and way too big so I just machined it down on my bench grinder and came up with a solid rubber piston. Since I put it in, I'm yet to have a single problem with it. When lubed up, it is extremely smooth and slides very, very well. Probably the best out of anything I've tried for a piston. Even at 300psi with 100 shots fired, the barrel doesn't cut into it at all. It's just perfect. I'm using it in my 6mm mounted pump bb gun. Yesturday I shot it at 300psi and geeez....at that pressure, the ammo pisses through anything! It's great.

I don't think I'll ever go back to my previous piston materials, just no point. To me, this is as good as it gets :D.
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Unread postAuthor: PVC Arsenal 17 » Sun Dec 09, 2007 9:25 pm

That answered one of my questions. I'll have to try this.
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Unread postAuthor: Mitchza89 » Sun Dec 09, 2007 9:33 pm

Definately. It just saves so many hours in the shed ripping your hair out trying to get something to work.
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Unread postAuthor: knappengineering » Sun Dec 09, 2007 9:59 pm

It sounds like a great idea, I'll have to try that since I've been having so many piston problems. Thanks.
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Unread postAuthor: Mitchza89 » Sun Dec 09, 2007 10:28 pm

What sort of problems have you been having?
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Unread postAuthor: f.c » Sun Dec 09, 2007 10:49 pm

thanks mate as you know ive got a piston gun in the works.
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Unread postAuthor: Mitchza89 » Sun Dec 09, 2007 10:50 pm

Haha yeah. Hows your gun going anyway?
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Unread postAuthor: knappengineering » Sun Dec 09, 2007 10:54 pm

My problem is that most of the air is going out the pilot valve instead of out the barrel. I have a new piston finished and ready to try, but I'll wait till tomorrow to fire up the compressor so neighbors/parents aren't annoyed :wink: It looks like a great piston, hope it works! I'll let you know how it goes tomorrow. :twisted:
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Unread postAuthor: Mitchza89 » Sun Dec 09, 2007 10:56 pm

Ahh yes that was one of the problems I had... How piston guns can irritate and annoy! :D
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Unread postAuthor: schmanman » Mon Dec 10, 2007 10:58 am

nice! I was working on my piston for my bb rifle yesterday, and I was thinking of doing something like that. did anyone ever play with legos?

I went into my basement looking for a piston that fits in 3/4 inch pipe, amid in my $1200 of legos I dont use anymore.

perfect!




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Last edited by schmanman on Mon Dec 10, 2007 10:59 am, edited 1 time in total.
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Unread postAuthor: Maniac » Mon Dec 10, 2007 4:31 pm

whoa those lego things fit 3?4 pipe ill have to try that i (my brother) has a million of those
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Unread postAuthor: ALIHISGREAT » Mon Dec 10, 2007 4:42 pm

hooray for lego! possibly the most useful thing ever invented! i must have a look at my old lego at some point, there may be something useful iding in there.
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Unread postAuthor: Mitchza89 » Mon Dec 10, 2007 6:59 pm

Hmmm thats a really cool idea. I'll have to have a look. Thanks alot for the idea mate. :D
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Unread postAuthor: schmanman » Mon Dec 10, 2007 7:08 pm

no problem!

I cut/broke some of the length off the back to make it fit better, too.

the rims for the crawler track thingies fit good too.


oh, btw, just lube it, and jam it in there. it seals so well, you may want to poke a little equalization hole in the edge of the front.

you may want to try to take the ridge out of the inside of the pipe /w/ a round file, and a little off the inside of the threaded edges.
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Unread postAuthor: sandman » Mon Dec 10, 2007 8:42 pm

I <3 Legos

I still use mine, but never thought bout using them for spudguns

For proof i still use them, i made this the other day
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