leakage in my pneumatic cannon

[mattyzip77]

at the end of my chamber there is a small leak where the endcap joins the chamber. should i cut off the endcap and put on a new one, or just try to jb weld it up. apparently i didnt use enough cement. please comment and or help. sorry if this is posted in the wrong section!!

[Gun Freak]

Cut it off and reglue. This belongs in the pneu discussion I think.

[jsefcik]

@ Matty zip, you can cut it off and put on a new one, But I had the exact same probelm your having , I put mine under water and plugged it with jb weld and hit it with a heat gun to fill in the cracks, Next i took my vacum cleaner taped it on the open end of my cannon and let the vacum suck in the jb weld into the hole.But its your cannnon, what ever works do it .Hope my idea works=)

[Gun Freak]

JB weld is a metal epoxy. If you are going to fill a hole with epoxy, use the syringe type or another two part, just not jb weld. Jb is high viscosity too. Not good for hole filling.

[jsefcik]

@Gun freak you are right my friend, I tried loctite 5 min epoxy and didnt have good luck with it.

[jrrdw]

You should use a coupler and plug with a o-ring. That keeps it serviceable.

[Gun Freak]

at the end of my chamber

That keeps it serviceable.

End of chamber does not need to be serviceable

[mattyzip77]

there is also a j b weld for plastics and pvc which is the one I use. It is 100 times stronger than epoxy and easier to work with. a new cap is only like two dollars, and I will only lose a couple inches off of the chamber, so I think I will go that way. But "jsefcik", that is a great idea and seems like a good process.. I also like the idea of the coupler and o ring that "jrrdw" suggested, but where would you put the o ring?? where the threads are on the cap?? let me know on that please, I'd appreciate it!!

[jrrdw]

where the threads are on the cap??

Cut a o-ring groove in the plug. 2/3rds of the o-ring should fit in the groove, maybe a little more. It should be a snug fit into the coupler but not so tight you need a hammer to get it in.

End of chamber does not need to be serviceable

Keeps things versatile, maybe turn it into a co-axle at a later date etc...

[mattyzip77]

ok, but wont the o ring move when you screw the cap into the coupler???

[Gun Freak]

You dont screw the plug, you use a slip plug. I still think you should just cap it.

[mattyzip77]

I have all the supplies to do it any of the ways mentioned, im just trying to learn more and more in the process of everything. But, i am going to re cap it, its the easiest route, and least stressful too!!!