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weneedtoo
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Size matters
Dec 2nd, 2019 at 9:20pm
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Cant seem to get the Gunsmithing topic to work so I will try here. I have acquired a .22 liner that seems unmarked but measures .20 dia. Mcmaster carr has a counterbore drill measuring 0.328. is that to much clearance? Thanks.
Richard
  
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weneedtoo
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Re: Size matters
Reply #1 - Dec 2nd, 2019 at 9:24pm
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Correction!!!!!!!!!! The Liner measures .320.
Richard
  
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uscra112
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Re: Size matters
Reply #2 - Dec 2nd, 2019 at 10:33pm
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Didn't happen to get that from Numrich, by any chance?  I made the mistake of buying a few from them, and they were all oversize on the O.D.    Embarrassed

Best solution, if you want to use them, is to drill with the usual 5/16 piloted drill (e.g. from Brownells, nominally .3125, but will cut larger) and then pass a reamer through to enlarge until the liner is a good fit. 

Or just chuck 'em out and buy proper liners from Brownells, which is what I did.   Smiley
  
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rgchristensen
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Re: Size matters
Reply #3 - Dec 3rd, 2019 at 6:29am
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If you drill it thru with a 5/16" drill, then with a size "P" letter drill, which is .323", you should come out OK.   OTOH, if you are going to all the trouble to re-line it, you probably should get a liner of known good quality.

CHRIS
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GT
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Re: Size matters
Reply #4 - Dec 3rd, 2019 at 11:29pm
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Richard,
To answer your question, .008 and the counterboring tool will probably cut a couple more oversize... is too much.
As mentioned, it would be a lot less challenging to order a liner from TJ's or Brownell's and a piloted drill from the same.
Now, if you have a lathe and the desire, Guy Lautard in one of his Bedside Reader's describes a tool you can make for turning a long tube like you have.  I had an old gentleman show me the trick a few decades ago and I've used it a couple times, Guy described the process quite well if I recall - if you're interested I'll look and see if I can come up with the details... but it's a little bit of work.
What is it you plan to use the liner in?
Greg
  

"To invent, you need a good imagination and a pile of junk"  T. A. Edison
"If you don't know what leever A does, then leever B... you Dumb@$$"  G.C. Tryon
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weneedtoo
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Re: Size matters
Reply #5 - Dec 4th, 2019 at 10:28pm
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Thanks for the suggestions everyone. Its a Hopkins and Allen that must have been pretty rusty before. Someone took a wire wheal to it so its no show piece. The barrel is roached inside as well. Not sure at all about the origin of the liner. Trying to keep it simple and cheap. I can be a little cheap at times. I no longer have access to a lathe. The suggestion to use a 5/16 followed by a P drill is interesting. Planning to get my Grandson to help on this. Again thanks for the replies. I was afraid the clearance was to big on the .328 drill. Thanks
Richard
  
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uscra112
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Re: Size matters
Reply #6 - Dec 4th, 2019 at 11:24pm
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Too bad about not having a lathe. I've rebarrelled a couple of H&As using cast-off Marlin Model 60 barrels, which you can buy on Gunbroker any day of the week for about $60.  Makes the little rifles more accurate than they ever were when they were new, at some loss of originality. 

Which hardly matters with a rusty old H&A. 

A chucking reamer of the exact size needed will cost you about $20 on Amazon, (yes, Amazon).  Problem then is how to extend the shank.  Hard to do without a lathe, but possible.

Our resident relining guru John Taylor reams his barrels when relining.

What will you do for a chambering reamer? 

« Last Edit: Dec 4th, 2019 at 11:30pm by uscra112 »  
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uscra112
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Re: Size matters
Reply #7 - Dec 4th, 2019 at 11:37pm
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Coarse aluminum-oxide sandpaper, buckets of elbow grease, a micrometer to check progress, and a dozen pounds of patience  might reduce that oversize liner, if all else fails.
  
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Re: Size matters
Reply #8 - Dec 5th, 2019 at 2:26am
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uscra112 wrote on Dec 4th, 2019 at 11:37pm:
Coarse aluminum-oxide sandpaper, buckets of elbow grease, a micrometer to check progress, and a dozen pounds of patience  might reduce that oversize liner, if all else fails.


Grin Grin Now that kind of patience and diligence reminds of a fool I know that broaches gear racks in gun sights.  Rates up there with hand lapping and polishing plastic injection molds...
  

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"If you don't know what leever A does, then leever B... you Dumb@$$"  G.C. Tryon
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n.r.davis
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Re: Size matters
Reply #9 - Dec 5th, 2019 at 6:26pm
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Or Scraping in a Cast Iron Surface Plate,  Life is too short for such foolishness. Cool  David
  
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uscra112
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Re: Size matters
Reply #10 - Dec 5th, 2019 at 8:04pm
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Jeeezo Pete are you guys spoilt!   Roll Eyes
  
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weneedtoo
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Re: Size matters
Reply #11 - Dec 6th, 2019 at 10:26pm
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Again, thanks for all the replies. USCRA112, it is already chambered. Plan to just glue it in square with the original barrel shank. This planed as a learning experiment. But I hope it turns out good enough to shoot. My Grandson will be helping and shooting. I have a Ballard #2 in .32long that I am planning to reline to .32/20 next if this turns out well. Thanks for all of the help!
Richard
  
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