Sleeving FX .25 STX Supreme liner

[mackeral5]

I am planning to sleeve a .25 FX STX liner with CF tubing.  The liner measures just under 9.1mm in diameter.  Loctite 680 specifications claim .38 mm gap fill, which isn't enough to use 10mm CF tubing--I would definitely have concerns about the liner being perfectly parallel with 10mm tubing.

I have doubts about my ability to consistently increase ID of 9mm tubing as well as my ability to consistently decrease the OD of the liner down to 9mm. 

Recommendations??

[Lani52]

I am glad your doing this.  Those liners will fall in price now that the superior liner is out.  There are 4 of them for $220.00 on the AGN classifieds.

A great cottage industry potent8al there.

Regards,

Roachcreek

[PikeP]

Why not use spacers/shims/orings (to the likes that increase the od to 9.8~mm concentrically) (3 or 4 down the length of barrel) to keep it centered in a 10mm tube? Adhering then should be quite easy to keep concentric.

I'd personally do 2 spacers, one on each end, with small feed holes. Plug one feed hole, fill with loctite let cure, flip and repeat if necessary.

[mackeral5]

Why not use spacers/shims/orings (to the likes that increase the od to 9.8~mm concentrically) (3 or 4 down the length of barrel) to keep it centered in a 10mm tube? Adhering then should be quite easy to keep concentric.

I'd personally do 2 spacers, one on each end, with small feed holes. Plug one feed hole, fill with loctite let cure, flip and repeat if necessary.

Sounds reasonable, I have considered using 10mm and some form of bushings. 

I am hopeful someone who has actually completed the task will chime in.  Ideally someone will reply and say order ABC tubing from ABC vendor, it's the perfect size......but that may be too much to ask lol.

I am still debating which gun the sleeve will ultimately go in.  The B51 project triggered the purchase, but it would be pretty cool to put a little longer barrel in the P15 and shave some weight at the same time.  then you have the fact that I don't intend the p15 to be a longer range gun, so would possibly be wasting the liner's potential.....decisions, decisions....

[GSu]

There is a video somewhere with Ernest doing exactly that.

[PikeP]

I propose an elegant solution. Sell all your air guns and buy an fx impact instead of barreling them all with fx liners. 

[KnifeMaker]

I am planning to sleeve a .25 FX STX liner with CF tubing.  The liner measures just under 9.1mm in diameter.  Loctite 680 specifications claim .38 mm gap fill, which isn't enough to use 10mm CF tubing--I would definitely have concerns about the liner being perfectly parallel with 10mm tubing.

I have doubts about my ability to consistently increase ID of 9mm tubing as well as my ability to consistently decrease the OD of the liner down to 9mm. 

Recommendations??

Mike, I have done several. One cf tube was a slip fit. I will try and find the order on the bay.
the other was as yours, and I used tooth pics to align at the very ends. As it had to be shortened,it worked perfectly.
The tooth pics were used as wedges, but being tiny (tips only inserted) they did not cause any issues. I used loctite first. The creeping formula. However, I later learned that there were sections inside that were still liquid after a week.
GRRRR.
I switched to industrial strength JB metal weld and other than having to work fast to fit the tube, it worked perfectly. You have seen the targets of this barrel here on the forum.


Mike

[KnifeMaker]

Found it!  


for what ever reason it not what I ordered showing in the actual pic in the link.
Simply scroll down and there is a huge listing of what it available. If not listed, contact seller. He is slow, but very high quality. (I have bought some that was terrible)!

https://www.ebay.com/itm/Glossy-12mm-OD-8mm-ID-1000mm-Length-3K-Roll-Carbon-Fiber-Tube-12-8-1000/283042430587?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

[denovich]

My Skyhawk is shooting slugs better than it has any right to. But now that I have seen what slugs can do I want to see what they’ll do with a purpose made barrel. 

I also like to tinker. And I have a lathe. The FX liner seems hard to beat. This project is at the top of my todo list.

[mackeral5]

Matt----I would still have to fork out well over a grand after selling all of my guns....a fair price isn't very much for a bunch of hacked up mod'd guns, lol

Mike/Knife---thanks for the referral, the .25 liner is roughly 9.1mm vs. 8mm.  I think I've settled on using 10mm tubing. 

The good news is that I don't have to rush anything now that the liner is here and I know what I'm up against.  This one may sit on the shelf a little while......

[RDB]

I've increased the ID of the carbon fiber tube with a split dowel and 80 grit sand paper chucked up in my cordless drill. Took a few changes of paper but worked well.

[Sbak]

Could probably use 3/8 inch id carbon tube. Should be close enough. Btw I've used jb weld on all of my carbon fiber sleeved barrels. Never had an issue with one yet

[YEMX]

If it were my project, I'd sleeve the TP section in steel, and the rest in CF.  I believe (please correct me if I'm wrong) that you only need a minimum of 1 caliber depth of CF in the breech to take advantage of the stiffness- more is better of course.  Personally, I'd also sleeve the muzzle end and thread it for an LDC as well...  Only need enough to make threads and have a good shoulder for the LDC to butt up against.

By "STX", I assume you mean the original smooth twist barrels?  I hope y'all are right- I've been wanting to build something in .25 using one of those barrels for a long time...

[rkr]

If it were my project, I'd sleeve the TP section in steel, and the rest in CF.  I believe (please correct me if I'm wrong) that you only need a minimum of 1 caliber depth of CF in the breech to take advantage of the stiffness- more is better of course.  Personally, I'd also sleeve the muzzle end and thread it for an LDC as well...  Only need enough to make threads and have a good shoulder for the LDC to butt up against.

By "STX", I assume you mean the original smooth twist barrels?  I hope y'all are right- I've been wanting to build something in .25 using one of those barrels for a long time...

No need to thread, you can buy silencer adapters that fit on top of your CF pipe.

[Lani52]

When I first preordered my Skyhawk, there were two barrels for sale thar someone made for the P-15 using  both a pellet and slug liner.  I passed because I just did not have the knowledge about them.

Wish I had purchased them.

Roachcreek

[Bunyboyz]

If you want a good laugh. YouTube search


FX impact liner CF sleeve installation

Maybe I’m wrong, but guy says stiffen your barrel and cushion vibration all in one sentence.  He bonds the liner with bathroom silicone from Home Depot right out of caulk tube.

 Saw this on the FX owners Facebook group it’s always good for a laugh over there

[Backyard Shootr]

Ernest Rowe uses Dap bathroom sealant caulking on his CF sleeves. And he is the FX expert.

[Rallyshark]

I wouldn't be afraid to open up some 9mm ID carbon tube to fit that liner.  I've had to do that with all the .22 FX liners, but with 8mm ID carbon.  I took a dremel sanding drub, cut it, and put it in a large piece of music wire with a slit cut in the end.  Then I chucked that up in the drill and ran it up and down the length of the carbon to open it up to fit the liner. 

[PikeP]

Ernest Rowe uses Dap bathroom sealant caulking on his CF sleeves. And he is the FX expert.

Hes the fx expert? You mean the guy I corrected and guided as to how to obtain more power when he was seeking for such in .30 cal on the impacts?

Sure...expert on fx because hes spent countless hours repairing and disassembling them...but NOT an expert in a general sense, nor logical sense. Bathroom sealant dries very soft, and to be used in any shape or form with barrel sleeving/stiffening is counter-intuitive, and quite frankly, the idea is dumber than a box of rocks...I not only highly advise against it, but I encourage you to thoroughly chew the @@@ out of anyone who attempts it.

[mackeral5]

If it were my project, I'd sleeve the TP section in steel, and the rest in CF.  I believe (please correct me if I'm wrong) that you only need a minimum of 1 caliber depth of CF in the breech to take advantage of the stiffness- more is better of course.  Personally, I'd also sleeve the muzzle end and thread it for an LDC as well...  Only need enough to make threads and have a good shoulder for the LDC to butt up against.

By "STX", I assume you mean the original smooth twist barrels?  I hope y'all are right- I've been wanting to build something in .25 using one of those barrels for a long time...

LOL>....I typed Supreme vs. Superior.  It is an STX Superior, in .25, 600mm long  Supposedly shoots up to JSB 34gr length ammo very well. 

LDC adapter will likely be some form of slip on.  Breech end will be sleeved with 4130. 

Going to let this one marinate a bit, not quite sure what I'll end up doing.  Once some 13mm OD CF becomes more readily available I'll probably pick it back up.  Seems all of the usual ebay sellers are out... Why 13mm?   This would be a good fit with my P15 or if I go with the B51 it wouldn't require a new barrel band. 

Thanks for all of the responses