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What would fit paintballs better?

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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What would fit paintballs better?

Unread postAuthor: akaddis » Thu Feb 01, 2007 5:05 pm

What would fit paintballs better?

1/2" SDR 21 or 3/4in sch80????

I was told that sdr21 is hard to find?

Tell me what you think.

Thx

Andrew
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Unread postAuthor: Pneumatics » Thu Feb 01, 2007 5:14 pm

I always used 3/4" sch80. but if you want a perfect fit do what i did and take a crappy paintball gun and remove the barrel then jamm the end into a pvc fitting then glue the sh1t out of it.
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Unread postAuthor: noname » Thu Feb 01, 2007 5:45 pm

1/2" SDR 13.5 is the best fit you can get, if your hardware store doesn't have it, use 3/4" CPVC.
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Unread postAuthor: Velocity » Thu Feb 01, 2007 5:54 pm

.68" rigid aluminum tubing... its what they use on real paintball guns; somewhat expensive for a small size however ($2.50 a foot)
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Unread postAuthor: imablackskater » Thu Feb 01, 2007 6:09 pm

try and use some sch 40 if you can i have some and it gets up to 600 psi
:)
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Unread postAuthor: medievalman » Thu Feb 01, 2007 6:13 pm

imablackskater wrote:try and use some sch 40 if you can i have some and it gets up to 600 psi
:)


You really need to know what you're talking about before you start saying this $h!t If you knew what you werew talking about, you would know that sch 40 doesnt fit paintballs as good as sch 80, and you would also know that sch 80 can hold MUCH higher pressures! i just have one thing to say: RESEARCH!!!
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Unread postAuthor: mark.f » Thu Feb 01, 2007 9:18 pm

rmich732 wrote:.68" rigid aluminum tubing... its what they use on real paintball guns; somewhat expensive for a small size however ($2.50 a foot)


I've still got about 2' left over from the last time. For some reason, McMaster must have bumped up the price of it. When I bought it, I got everything, (including self-aligning compression nut and some other crap I needed), for under 20 bucks. If you've got a store around you that sells hydraulic/pneumatic actuators, valves, and tubing, try there, and bring some calipers or, if you want to look stupid, a paintball. :P Ask them for rigid 3/4" hydraulic tubing. Also, look for a "self-aligning" compression nut so that your barrel doesn't run off at an angle from the gun.
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Unread postAuthor: SpudBlaster15 » Thu Feb 01, 2007 10:21 pm

1/2" SDR 21 is the best fit you can get aside from .68" aluminum tubing.
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Unread postAuthor: Velocity » Thu Feb 01, 2007 10:37 pm

Do you really need the self aligning compression nut? I have used several barrels with the compression fitting that did not "self-align", and had success. The self-aligning compression fittings certainly have a higher pressure rating though
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Unread postAuthor: mark.f » Fri Feb 02, 2007 6:39 am

In a normal one, there's an "olive" inside the compression nut that fits over the tubing. When tightening, it's pretty hard to get that olive to stay straight inline with the nut. On a self-aligning fitting, there's a "cone" that's attached to the nut from the inside which stays straight during tightening.

There have been a couple of times in which I got a normal compression nut from Home Depot and used it on copper or aluminum, (1/4"), tubing, and had the stuff go bonkers to where I had to bend it the right way with pliers when I was done tightening.
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Unread postAuthor: Velocity » Fri Feb 02, 2007 10:39 am

Oh good... I hear this not 1 hour after I ordered my stuff from mcmaster :P :?

Hopefully, it will work alright...
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Unread postAuthor: newkidspudster » Sat Feb 03, 2007 11:40 am

3/4 1/2 is to little ive tried :wav: :blob6:
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Unread postAuthor: frankrede » Sat Feb 03, 2007 3:27 pm

newkidspudster wrote:3/4 1/2 is to little ive tried :wav: :blob6:
No really?
Think about it nub a paintball has an outer diameter of .68 of an inch, how would it fit in a .5" hole?

And we know its 3/4 read before you post.
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Unread postAuthor: DeathBlade » Sat Feb 03, 2007 6:30 pm

3/4" in sch 120 would be the best fit, I know that harvel makes it but finding it would be another question. If all else fails got to www.onlinemetals.com and get a piece of .75" OD pipe with a wall thickness of 0.035 and that will give you a ID of 0.68
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Unread postAuthor: PVC Arsenal 17 » Sat Feb 03, 2007 6:51 pm

1/2" SDR 13.5 is a very good fit, not the best, but good enough. It is thin wall though so don't use it in a coaxial or in any configuration where it will be under pressure.

3/4" CPVC is also good, and is rated for a higher pressure but cannot solvent-weld to PVC well. You can always get a male adapter and thread it into your gun.
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