FX Bent barrel?
- Thread starter HogKiller
- Start date
One thing that we use to do to our rifles when I played airsoft. The barrels on many of the "sniper rifles" are built the same way as the FX barrel system is made. I would remove the inner barrel and apply some electrical tape as tight as I could. Then put the inner barrel back into the outer barrel and then make a plug to center the barrel with the outer barrel. Melt some wax and slowly pour it between the two barrels. Once hardened it would secure the inner barrel and there would be no vibrations or movement.
Have considered doing something similar with the FX barrels. Though I would wax the inner barrel to aid in removal of the liner, and use a slow curing epoxy instead of the wax. This should make a much more solid connection as well as helping with centering the liner. Could easily be done in stages as well to make sure there are no air bubbles and that the liner is centered. Could be a cheap and easy way to make a custom liner if you are unable to find a carbon sleeve.
Have considered doing something similar with the FX barrels. Though I would wax the inner barrel to aid in removal of the liner, and use a slow curing epoxy instead of the wax. This should make a much more solid connection as well as helping with centering the liner. Could easily be done in stages as well to make sure there are no air bubbles and that the liner is centered. Could be a cheap and easy way to make a custom liner if you are unable to find a carbon sleeve.
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Do not use epoxy. I had access earlier to a high tech lab where we were epoxying sensors for medical instrumentation, with robots - for consistency.
In two years time we tried many things, but have not seen an epoxy that doesn't expand when cures. Some more and some less, but all of them not staying stil.
And btw that means, it expands exponentially how big is a gap... small gap expands less bigger gap in between the liner and the surrounding expands more. Resulting = nomore straight liner.
In two years time we tried many things, but have not seen an epoxy that doesn't expand when cures. Some more and some less, but all of them not staying stil.
And btw that means, it expands exponentially how big is a gap... small gap expands less bigger gap in between the liner and the surrounding expands more. Resulting = nomore straight liner.
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If the epoxy expands wont that just push out towards the open end of the barrel? Not trying to argue just thinking out loud.
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I haven't seen any expansion. I do know you need really thin epoxy. Someone said you could use superglue but I'd want some stuff that sets REALLY SLOW. You never get the epoxy anywhere near the ends, unless you've done something silly<---- voice of experience here....acetone is your friend.
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I'd imagine even the blue would work fine. I'll make the sacrifice and try it. In all honesty, in my shooting with and without a sleeve I can't see a difference at 30 yards. Disclaimer, using only a bi-pod on the front, shaky old guy at the other end.
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well, they are a slip fit not an interference fit so there is a touch of wiggle room for the liner, I'm not sure they make a measurable difference. Now if you are making your own pellets and can verify that, it'd be cool.
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The curing properties and performance of Loctite and other similar anaerobic adhesives are influenced by the materials being joined. They usually work best with what are referred to as "active" materials like steel (unplated) and brass.
At the other end of the spectrum are materials like stainless steel, aluminum, zinc...and most if not all composites like carbon fiber tubing. So if you plan to bond a CF sleeve, you'll want to use specially formulated for inactive materials like Loctite 638 or use a separate activator to promote curing and adhesion.
At the other end of the spectrum are materials like stainless steel, aluminum, zinc...and most if not all composites like carbon fiber tubing. So if you plan to bond a CF sleeve, you'll want to use specially formulated for inactive materials like Loctite 638 or use a separate activator to promote curing and adhesion.
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Regarding epoxy, normally there is a very small amount of shrinkage, not expansion. Various industry figures hover around 3%
www.hpdconsult.com
Granted there are formulations that expand by way of special additives, however one who possesses such an epoxy most likely went out of his way to obtain it.
www.cs8-consulting.com
Does Epoxy Shrink When Curing? (2022)
Yes, epoxy resin shrinks when curing. Shrinkage can be caused by a number of different things, including temperature, thickness, and usage. For example,
www.hpdconsult.com Granted there are formulations that expand by way of special additives, however one who possesses such an epoxy most likely went out of his way to obtain it.
Volume changes during setting of thermoset resins - CS8 Consulting
Thermoset resins: an overview of cure shrinkage and mitigation measures that can be applied to aid zonal isolation of oil and gas wells.
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So if there's say about .01 room around carbon fiber and the liner?
Given a 3% shrink factor thats like .0003
Seems pretty good to me!
Given a 3% shrink factor thats like .0003
Seems pretty good to me!
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I have wrapped my liner with a Teflon tape single layer continuous spiral from one end to other, and just pushed in to the CF sleeve. Will not move on its own but I can replace it to the other gun.
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If your not using a cf sleeve I put a o-ring on the bottom of barrel so it seals and push it all the way into its seat fill the tube part way and install the barrel nut loosely so the barrel centers to it's seats let it cure and do the second half after the first cures just be careful to keep it out of the threads on the outer barrel lock also would clamp it so it was straight up and down could put a release agent on the barrel might still be able to swap out the inner barrel that way idk just thinking out loud
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You'd have to screw the liner out as it does have grooves from the twist on the out side.
Then there is the area that has no grooves so don't think it will work.
Then there is the area that has no grooves so don't think it will work.
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I was think about over torquing the nut and was wondering how short it is from cf sleeve I would like the nut to bottom out on the sleeve just before it touches end of barrel I might try to measure and see how far it is off and throw in a peek spacer or buy a 500 mm and cut some off it for a spacer
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Put a bit of clay on the liner then tighten the nut. If there's space? It will show. If not? You could trim the liner end.
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