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2" piston ideas?

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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2" piston ideas?

Unread postAuthor: niglch » Sat Apr 12, 2008 10:37 pm

I'm attempting to build my first pneumatic with a 2" PVC tee piston housing. Besides casting from epoxy, what else have you guys used for making your 2" pistons? I know there are probably a bunch of ways, but I'm just curious as to what has worked well in the past. Thanks for the input.
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Unread postAuthor: MrCrowley » Sat Apr 12, 2008 10:39 pm

http://www.spudfiles.com/forums/how-to- ... 10381.html

Always check stickies for useful topics, in every forum section. If you can't find any good stickies, search.

Another case of posting without searching. :roll:
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Unread postAuthor: starman » Sat Apr 12, 2008 10:44 pm

1.5" end caps fit in there pretty well.
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Unread postAuthor: bigbob12345 » Sat Apr 12, 2008 11:07 pm

starman I thought it was 1.25in end caps
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Unread postAuthor: Blitz » Sat Apr 12, 2008 11:15 pm

1.5" end caps would have to be sanded down some, but 1.25" don't.

My pistons are generally made from 1.25" couplers and 2" washers.
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Unread postAuthor: Gippeto » Sun Apr 13, 2008 7:33 am

I used a 1 1/4" end cap, but pieced it together a bit differently.
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Unread postAuthor: SpudFarm » Sun Apr 13, 2008 8:45 am

MrCrowley wrote:http://www.spudfiles.com/forums/how-to-make-a-pneumatic-cannon-with-a-2-piston-valve-t10381.html

Always check stickies for useful topics, in every forum section. If you can't find any good stickies, search.

Another case of posting without searching. :roll:


that is why you should have sticked my topic.. it is for every sized piston..
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well a easy piston out of a right sized wooden dowel..
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Unread postAuthor: jrrdw » Sun Apr 13, 2008 8:46 am

Made mine from wood, (Oak) 2" diameter X 2 1/2" long. 1/8th" X 2" rubber washer for the sealing face. 1/4" steel carriage bolt holding the seal on. 2, 1 1/2" o-rings at each end for piston side clearance and a 1/32nds" equilzation hole, (lined with brass tubing) useing the sealing face rubber washer for a check valve.

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Unread postAuthor: SpudFarm » Sun Apr 13, 2008 8:59 am

that is a real life how to on my diagram..
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Unread postAuthor: MrCrowley » Sun Apr 13, 2008 2:18 pm

spudfarm wrote:
MrCrowley wrote:http://www.spudfiles.com/forums/how-to-make-a-pneumatic-cannon-with-a-2-piston-valve-t10381.html

Always check stickies for useful topics, in every forum section. If you can't find any good stickies, search.

Another case of posting without searching. :roll:


that is why you should have sticked my topic.. it is for every sized piston..

*sigh*

What the hell spudfarm? Your topic is inadequate to be a sticky, it is confusing and just doubles what mine and clide's say. I told you what to do if you want it to be a sticky, people agreed with me and even said it's not worthy of one.

Do something new. Your topic was very, very confusing. It may be for every sized piston but people have trouble finding the MATERIALS to FIT the PIPE inside the TEE. It's not as simple as finding a cylindrical piece of wood that fits perfectly.

It just doesn't happen, and not everyone can machine a piece of wood down either. The hardest part, no doubt about it, is finding a suitable material that fits your piston housing.

That's why it is impossible to have one diagram of a piston that supposedly fits all pistons. It just cannot happen. That is why my 2" topic is limited to only 2" pistons.

Also:
http://www.spudfiles.com/forums/viewtop ... tml#136508

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Unread postAuthor: Pilgrimman » Sun Apr 13, 2008 2:48 pm

Suave deodorant caps. Fit perfectly in 2" tees. I've made pistons out of them, and had no problems!
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Unread postAuthor: Blitz » Sun Apr 13, 2008 3:18 pm

Pilgrimman wrote:Suave deodorant caps. Fit perfectly in 2" tees. I've made pistons out of them, and had no problems!
Interesting -- they're durable enough? I didn't think they would be. Most of those deoderant cans use very brittle plastic in their caps.
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Unread postAuthor: jrrdw » Sun Apr 13, 2008 3:31 pm

Blitz wrote:
Pilgrimman wrote:Suave deodorant caps. Fit perfectly in 2" tees. I've made pistons out of them, and had no problems!
Interesting -- they're durable enough? I didn't think they would be. Most of those deoderant cans use very brittle plastic in their caps.


You fill it up with hot glue or epoxy.
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Unread postAuthor: Blitz » Sun Apr 13, 2008 3:47 pm

jrrdw wrote:
Blitz wrote:
Pilgrimman wrote:Suave deodorant caps. Fit perfectly in 2" tees. I've made pistons out of them, and had no problems!
Interesting -- they're durable enough? I didn't think they would be. Most of those deoderant cans use very brittle plastic in their caps.


You fill it up with hot glue or epoxy.


Well yes, but I was talking about using them alone.
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Unread postAuthor: jrrdw » Sun Apr 13, 2008 3:51 pm

That would never hold up, one shot and smash thats if it held the pressure.
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