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07-17-2010, 08:33 PM #1
Type of Locktite for barrel liner?
Can anyone recommend a Locktite product number for a .22 barrel liner, based upon actual experience using it? I have used Acraglas in the past, but I'd like to try Locktite. Any help will be appreciated. Thanks! Joe
07-18-2010, 06:47 AM #2SmithSolar Guest
07-18-2010, 07:22 AM #3
I'm going to pay attention here , as I have a rifle to reline also [.22] I was going to go with the acraglass but if there is a better method ? If they are soldered is it just the ends or do you try to solder the full length ? Shrink fit , how much interference ? Whats the best accepted method ? Jim
07-18-2010, 08:32 AM #4
Good quality epoxy works quite well. Epoxy has been used for 40 years by such firms as Remington and Simmons to secure shotgun ventilated ribs. Simmons.
Teague of England uses epoxy to secure the shotgun liners they install full length in older double barrel shotguns--works very well.
Some shotgun manufactures are now using black colored epoxy to secure double barrel shotgun upper and lower ribs--although I had rather have them low temperature brazed as the quality Spanish firms such as Arietta do.
I would venture to guess that high strength Locktite will work.
07-18-2010, 09:19 AM #5
Loctite 609 works perfectly. I have used it for several reline jobs and Loctite tech people recommend it. Truth is there is so much area to bond that any kind of anaerobic thread locker will work. 609 has a low viscosity which insures that the space is filled end to end.
I use an 8 mm liner drill and push the liner in with the barrel in a vertical position, keeping the liner OD wet with 609 as it enters the barrel. The clearance is minimal and I have seen the the joint at the muzzle disappear when the crown is recut.
07-18-2010, 10:37 AM #6
Loctite works good.
If you do it right, you could'nt blow that liner out of there with dynamite.
07-18-2010, 06:19 PM #7SmithSolar Guest
07-18-2010, 07:57 PM #8
I have been repairing and restoring rifles and shotguns for 40 years and even though I don't believe the shrink fit you mention is possible in a gunsmiths shop, I am always open to learn new methods.
07-19-2010, 05:52 AM #9SmithSolar Guest
I like the epoxy way its fast, not hard to do and cheep
The shink fit is for some how has a lot of cash
1. drill and ream this take a ruffing remer and a finishing ream and hold the bore to 0.0001"
2. measure the bore this has to be done with in +- 0.00005"
3. send liner to a machine shop the has a centerless grinder and have ground over size by 0.0002 to 0.0003"
4. check the hardest of barrel to see it heat treated
5. heat barred up to 500 deg
6. put the kine into liquid nitrogen for a few min
7. take hot barrel and slide the liner into barrel
This is the best but for most firearms you can buy new one for the cost of shink fit
I like the epoxy way its fast, not hard to do and cheep hard to make a mistake. With shink fit one tiny mistake and you are buy a new liner
07-19-2010, 06:19 AM #10
Now for the other part of my question. Who do you know who has actually ever done this?
07-19-2010, 06:20 AM #11
I have to ask: How will the centerless grinder hold center?
07-19-2010, 07:31 AM #12SmithSolar Guest
It is machine tool call a centerless grinder
It grinds with out centers
07-19-2010, 07:54 AM #13
07-19-2010, 07:59 AM #14SmithSolar Guest
As true as the part you start with.
Last edited by SmithSolar; 07-19-2010 at 02:11 PM.
07-19-2010, 08:21 AM #15
Shrink fit theory
As I stated above your theory explanation of how shrink fit is accomplished was expressed well.
But are you ignoring my question of the practical application of theory--"who do you know (YOU or OTHERS) that have ever shrink fitted a liner in a rifle barrel"?
07-19-2010, 09:21 AM #16
07-19-2010, 02:53 PM #17SmithSolar Guest
07-19-2010, 04:40 PM #18
Pray tell then my dear fellow why did you write this:
"The best way to put the liner is the shink fit
Next best way is to solder
Loctite is at the bottom of the list"
Case closed. There is no evidence to support that your recommendation that shrink fit for .22 cal liners is the Best way for installation.
07-19-2010, 05:39 PM #19SmithSolar Guest
07-19-2010, 07:39 PM #20
Saw your question and decided to respond....It's a subject of great interest to me... I specialize in precision .22 target pistols. I prepare my liner first.. between centers to approx. .325 O.D. I strive for zero run out and taper. It's difficult to get that with a tool bit, but I can get very close...I then use a tool post grinder to get it perfect...When perfect, the diameter is what it is, and it is much easier then, to drill and reamer the barrel to to the clearance I need to match that liner.. I use 680 or 620 loctite.. Either one works very well. The 620 will withstand over 300 degrees, so bluing will not effect it. I talked with the Loctite engineers, and even though 680 is rated slightly lower at 290 degrees, they felt bluing temps would not harm it. I have blued numerous barrels with 680 secured liners with no ill results. As far as shrink fitting being the best, with out being disrepectful to the poster, that would be impossible. The stresses imparted to the liner would be very detrimental to accuracy. The Loctite method is completely stress free, and properly lined barrels out perfom orginals by a large margin..
Good luck, and hope this assists you..