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o-ring detent for BBMG
Posted: Thu Dec 23, 2010 7:34 pm
by JDP12
Hey all- want to make a o-ring detent for my unregged CO2 BBMG. only problem is, I can't really get 1/8" o-rings easily. So i was thinking of putting a hole in some rubber gasket sheeting and putting that in the gun to function as a detent, would that work? Thanks
Posted: Thu Dec 23, 2010 8:22 pm
by saefroch
What I did to make an o-ring seal, probably like what you're trying to do is screw a bushing into either side of a union, with the o-ring and a spacer in the middle of the two bushings. You can polish the spacer and the bushing the o-ring is against to make it seal. So far I haven't had a problem.
I wouldn't use gasket material, but that's me.
Posted: Thu Dec 23, 2010 8:24 pm
by JDP12
By gasket i meant just rubber sheeting, but it might not work, which is why i'm asking. O-rings are just hard to find around me.
Posted: Thu Dec 23, 2010 8:26 pm
by Vincenzo
Why don't you use POLAND's rubber washer sandwich method?
Posted: Thu Dec 23, 2010 8:28 pm
by JDP12
Yea something like that, I tried to find the thread that discusses it, but couldn't, do you know the link?
Posted: Thu Dec 23, 2010 8:38 pm
by Vincenzo
I don't believe there is. I think he just brought it up a few times in various threads. You can construct one using various methods... can you give me and idea of the sort of chamber you are planning and I can give you an idea for how to set one up? I awas actually looking into making one recently.
Posted: Thu Dec 23, 2010 8:40 pm
by JDP12
Yea its just a BBMG, the detent assembly would go on the barrel right after the vortex block. I think I know how I'm going to do it now, could post a picture of it later... too lazy to now.
Posted: Thu Dec 23, 2010 9:20 pm
by Vincenzo
I don't think you should use the detent on a vortex. A cloud would be better.
Posted: Thu Dec 23, 2010 9:22 pm
by JDP12
no, that's not true. that doesn't matter, a detent functions in the barrel. as long as bb's get fed in, it works. The type of feed mechanism doesn't matter.
vortex's are generally better as they are more air efficient.
Posted: Thu Dec 23, 2010 9:33 pm
by saefroch
There's a high-speed video somewhere on the site of a clear cloud firing, and the poor efficiency is very apparent.
*cough* JSR *cough* link *cough*
Posted: Thu Dec 23, 2010 9:34 pm
by JDP12
yea that's what I'm sayin.
Posted: Thu Dec 23, 2010 10:30 pm
by ramses
saefroch wrote:There's a high-speed video somewhere on the site of a clear cloud firing, and the poor efficiency is very apparent.
*cough* JSR *cough* link *cough*
here.
maybe
here
also, fine.
Posted: Thu Dec 23, 2010 10:38 pm
by saefroch
Thanks!
For what it's worth, I did try searching first.
Posted: Thu Dec 23, 2010 11:08 pm
by JDP12
Yea, sort of the point of a detent is to make a BBMG more efficient, in terms of power/shot.
Posted: Fri Dec 24, 2010 12:37 am
by jackssmirkingrevenge
It's in the
Wikitoo
POLANS_SPUD's "valveless" launcher is
here.
As to to original question, yes it should work, provided the hole is cut well, I would recommend the
sharpened tube method (without cutting your fingers
)
The only problem is that it wouldn't be adjustable, unless you could take it apart, start with a small hole, and make it progressively larger until you get the desired pop-off pressure.