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sight band diameter/solder question
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Hello - what is the general guideline on the proper difference in diameter between the barrel and a band (sight or sling swivel) that is being soldered onto it, for a proper "slip" solder fit? I was told .001 - I was also told that it varied with the diameter - that it would be different on a 6mm barrel versus a .458.

Any rules of thumb?

Thanks


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Posts: 39 | Location: East Tennessee | Registered: 23 September 2011Reply With Quote
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Ok...if the muzzle diameter is .600 what diameter barrel band front sight should I order? Conversely, if I have a sight that's .600 inside the band, what diameter should I specify at the muzzle when ordering the barrel. I don't have a lathe so it matters.


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Posts: 39 | Location: East Tennessee | Registered: 23 September 2011Reply With Quote
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Good question-looking forward to a response.
 
Posts: 11651 | Location: Montreal | Registered: 07 November 2002Reply With Quote
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Just a nice snug slip fit would seem right to me.

That fit works very well for soldering pipe together.
 
Posts: 19617 | Location: wis | Registered: 21 April 2001Reply With Quote
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I do not worry about the exact diameter; if it slips on it is ok. If you have to drive it on, it is too tight. If it falls on and wiggles, well, you will have a lot of room to fill up with solder; not ideal but it will still work. Use tin and silver solder. LIke Brownells force 44.
 
Posts: 17294 | Location: USA | Registered: 02 August 2009Reply With Quote
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Thanks, but you usually have to specify these things. Is .001 difference enough? Or do you typically need more than that for a slip fit for soldering? And I may be using slip fit incorrectly ...


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Posts: 39 | Location: East Tennessee | Registered: 23 September 2011Reply With Quote
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Solder with the proper flux will flow between a .0005" gap or smaller. When heated correctly the solder will want to get in the gap.


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Posts: 2534 | Location: National City CA | Registered: 15 December 2008Reply With Quote
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quote:
Originally posted by kcstott:
Solder with the proper flux will flow between a .0005" gap or smaller. When heated correctly the solder will want to get in the gap.


And even if you have to drive it on a bit there will still be a gap of .0005 under some of the sight. Right?

Duane Wiebe says that the banded front sights need to be reamed with a tapper or the ramp will not sit flush on the barrel.

Kerry, where in the world have you been!? I was just thinking that I needed to organize a search party. Glad to see you back here on AR!


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Posts: 6838 | Location: Nome, Alaska(formerly SW Wyoming) | Registered: 22 December 2003Reply With Quote
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Remember, the barrel is tapered, the ramp is not. The two need to be fitted to match. I taper bore mine.


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Posts: 5523 | Location: Minnesota | Registered: 10 July 2002Reply With Quote
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Thanks very much. That's kind of what I needed to know.


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Posts: 39 | Location: East Tennessee | Registered: 23 September 2011Reply With Quote
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Slips on means slips on by hand without wiggling. I turn my barrels straight for sight ramps that aren't tapered; easier than tapering the inside of the ramp. Sometimes I taper the inside; depends. .0005 to .001 is fine for a clearance. Anything where you don't have to drive it on is fine.
 
Posts: 17294 | Location: USA | Registered: 02 August 2009Reply With Quote
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OK thanks - so .001 is fine then. I know that the Recknagel sights are set up to match with Lothar Walther's barrels and there's usually .001 between the barrels and the band diameters.


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Posts: 39 | Location: East Tennessee | Registered: 23 September 2011Reply With Quote
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Doesn't have to be exact; it's not a rod bearing on a rocket motor.
 
Posts: 17294 | Location: USA | Registered: 02 August 2009Reply With Quote
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