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End cap 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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End cap pistons??

Unread postAuthor: Mitchza89 » Sun May 25, 2008 9:20 pm

G'day guys,

I'm making a pressure pipe boom stick at the moment. I've seen that on alot of guns, there is a pvc fitting thats been sanded a bit, to make a nice tight fitting piston. I'm using a faucet adaptor at the back of the Tee to have access to the piston.

From what I've gathered from other guns on here, a sanded down 3/4in pressure pipe end cap, should work on a 1'' faucet adaptor.

Cheers guys,

I know this site gets so flooded by silly questions like this but I'm sick as a dog at the moment. I just wanna find out before I go out into the cold to get the fitting.
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Unread postAuthor: elitesniper » Sun May 25, 2008 9:30 pm

Yeah they work nicely, what I might recommend is to fill the cap with epoxy then put a nice flat washer on it, then bolt down a sealing face. Good luck, sounds like a great plinker :wink:
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Unread postAuthor: Mitchza89 » Sun May 25, 2008 9:31 pm

Oh so I was right when I said a 3/4'' cap would fit into a 1'' Faucet Adaptor?? :D! Beautyyyy
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Unread postAuthor: elitesniper » Sun May 25, 2008 9:42 pm

Oh, im sorry, I misread your post, i thought that you knew that it fitted, but you just wanted to know if it worked good, sorry mate. :cry:
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Unread postAuthor: Mitchza89 » Sun May 25, 2008 9:44 pm

Haha oh dang.. It's all good mate. Aww my hopes had sky rocketed then :( Haha I'll just have to keep on trying different pistons to make.
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Unread postAuthor: Carlman » Sun May 25, 2008 9:46 pm

yes it does mate, i used a 20mm coupler cut in half for the piston of a co-ax i built that had PN18 25mm outer. Needs sanding a bit but alls good in the end. Aussie fittings and PN18 pipe have the same ID pretty much.
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Unread postAuthor: Mitchza89 » Sun May 25, 2008 9:48 pm

Yeah that's what I thought mate. Cheers alot for that hey. The only concern I have is sanding it a bit wonky so I get an oval shaped piston... Maybe the ol' hold glue is on the cards.
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Unread postAuthor: Carlman » Sun May 25, 2008 9:53 pm

Fill it with hot glue then shove a spade bit up its a$$ spin it on the drill with a sanding block rubbing on it, works a treat!

EDIT: CR*P i think it may actually be a 15mm coupler i used in the coax, 20mmm fits inside the female end of a 25mm fitting, little tired mate sorry.
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Unread postAuthor: Mitchza89 » Sun May 25, 2008 10:03 pm

Haha not to worry bud. Thanks anyway. I might just go and make a hot glue piston. It's the easiest. My glue gun has sh!t itself so what do ya think is the best way to melt it? Cut down an old beer can, stick some in and wack it over an open flame or boiling water?
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Unread postAuthor: Carlman » Sun May 25, 2008 10:13 pm

when i did mine i used a jet lighter and dripped it in lol

i have used a soldering iron before but it also creates a hell of alot of smoke, but you can just put a fan to blow it away.

id suggest soldering iron personally.
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Unread postAuthor: Mitchza89 » Sun May 25, 2008 11:00 pm

Soldering iron? In what way would I use that? :?
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Unread postAuthor: rp181 » Sun May 25, 2008 11:23 pm

lol dont use a soldering iron, that wil burn alot of the glue. I put a metal can in a fire, spary the inside with nonstick, and toss some glue in.
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Unread postAuthor: Carlman » Sun May 25, 2008 11:30 pm

rp181 wrote:lol dont use a soldering iron, that wil burn alot of the glue. I put a metal can in a fire, spary the inside with nonstick, and toss some glue in.


worked fine for me i just turned it down a couple of notches.

i just held it above nd pushed glue stocks aainst it
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Unread postAuthor: Mitchza89 » Mon May 26, 2008 12:29 am

Ah mates sense to me :D. I reckon you guys are gonna like this gun. She looks real nice so far.....It's just nothing that we haven't seen on files before...
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Unread postAuthor: elitesniper » Mon May 26, 2008 12:33 am

May we have a sneak peak of her? :wink:
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