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Invisable barrel liner seam (Read 1669 times)

KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Invisable barrel liner seam Jul 19^th, 2021 at 1:12pm	Print Post
	Can some one explain to me in machinist's language/terms the technique used to truly hide the joint line at the muzzle. Does one leave a feather edge by not allowing the liner drill to totally emerge from the hole, and does that angle get put on end of liner? I have done several over the years by the usual method of just drilling full length and closely matching drill to liner diameter, but it is still visible, but not terribly so. thanks kw


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n.r.davis Oldtimer Offline Posts: 613 Joined: Dec 3^rd, 2015	Re: Invisable barrel liner seam Reply #1 - Jul 19^th, 2021 at 9:02pm	Print Post
	You've ask a question I have puzzled. At the muzzle , not drilling through but staying about .5 short and then reaming or Boring to liner O.D. Might be a bit of a challenge to get the liner in. Soldering or glueing may make a difference. Details, details, details... David


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Invisable barrel liner seam Reply #2 - Jul 19^th, 2021 at 9:25pm	Print Post
	One could peen it over into the original metal both prior to the chambering and crowning process prior too. A bit hard for me to explain but I have done the same for some of my own misc. projects to make the seam go away but it is also just by looking at it by ones own eyes.

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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jfeldman ASSRA Board Member Offline Posts: 1119 Location: Imperial Beach, Ca Joined: Nov 5^th, 2005	Re: Invisable barrel liner seam Reply #3 - Jul 19^th, 2021 at 9:51pm	Print Post
	I have done exactly 2 (two!) relines of .22 barrels and have used the method explained to me that was used by the late and greatly missed Doug Knoell. This means that I am a complete novice! Using a ball bearing or a small ball peen hammer, place it on the muzzle after the barrel is bored out and strike it gently. Check the fit with a piece of the liner and repeat until it's a tight fit. I installed the liner from the breech and have had to use a block of wood to force the liner through the the muzzle. Turn off the excess and use coarse grit paper to blend with the barrel. I have been pleased with the way that they (all both) have turned out. Regards, Joe


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KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Re: Invisable barrel liner seam Reply #4 - Jul 20^th, 2021 at 11:04am	Print Post
	Joe the judicious use of a ball bearing sounds like a improved version of me gently tapping and swaging barrel mat'l with a round end pin punch and then facing the muzzle. Still seems possible to match drill flute angle to liner chamfer that has same angle.....except for the resultant "feather edge" that would result. kw


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John Taylor Frequent Elocutionist Offline Posts: 1850 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: Invisable barrel liner seam Reply #5 - Jul 20^th, 2021 at 7:42pm	Print Post
	I install more than a few liners. I have one hammer set aside for doing the muzzle. It has a slight curve to the face and polished smooth, weighs about 4 ounce. Holding the barrel in one hand and and tapping with the hammer around the bore will shrink the bore so there is a metal to metal fit. You don't want to get carried away when tapping or the liner can be deformed and then the gun will not shoot strait. The muzzle is then cleaned up in the lathe. If you want to hide it at the chamber end, leave the liner sticking out about 1/16" and peen it to flare it out ( after the Loctite has set). Then you will need to clean up the bore to get a chamber reamer in. I usually don't hide it at the chamber end.

	John Taylor Machinist/gunsmith
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KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Re: Invisable barrel liner seam Reply #6 - Jul 21^st, 2021 at 8:27am	Print Post
	John Taylor has a refined approach I will try on next job. On some restoration work I have put emery paper/cloth over the muzzle and gently tapped the back side to mat the muzzle surface to mimic the worn outside barrel finish. thanks for the info kw


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jfeldman ASSRA Board Member Offline Posts: 1119 Location: Imperial Beach, Ca Joined: Nov 5^th, 2005	Re: Invisable barrel liner seam Reply #7 - Jul 21^st, 2021 at 11:39pm	Print Post
	Let us know how it works out KFW. Regards, Joe


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