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Old 12-11-2012, 8:31 AM
swiftone swiftone is offline
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Default done


Last edited by swiftone; 01-13-2015 at 2:09 PM..
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Old 12-11-2012, 8:42 AM
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joelogic joelogic is offline
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Anodizing, IIRC, is only a couple thousands thick. Apply some anti-seize and try again.
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Old 12-11-2012, 11:19 AM
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^ I'd try that as well.
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Old 12-11-2012, 2:20 PM
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6mmintl 6mmintl is offline
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Did you specify plating thickness to anodizer? penetration/buildup?

I dont think anyone in their right mind would lend an expensive HSS or carbide tap to be burnished/worn tapping anodized aluminum.

You mitght have to shop around for an undersize tube.

Last edited by 6mmintl; 12-11-2012 at 2:22 PM..
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Old 12-11-2012, 4:06 PM
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kcstott kcstott is offline
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There's my answer

But if he was willing to drive down I'd run the tap through for him.
Originally Posted by ar15barrels View Post
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Old 12-11-2012, 5:41 PM
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ar15barrels ar15barrels is offline
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Originally Posted by swiftone
My 80% needs the threads chased after anodizing - buffer tube threads in only one turn without binding.

The person/shop that did the work is USAnodizing and I am sure Victor (the owner) knows how to apply type 3 anodizing as not to bugger up tolerances.
Type 3 anodizing almost always buggers up thread fit tolerances unless you specifically cut the threads larger to accommodate the thickness of type 3 anodizing.

Take some 320 grit lapping compound and lap the threads of the buffer tube and receiver together.
No fancy tools needed and the fit will be perfect.
Randall Rausch

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