Permanent Dry Lubricity
That’s what FailZero says of their AR-15 bolt carrier groups.
Remember, I do this to entertain me, not you.
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December 30th, 2009 at 12:07 pm
Havent we heard this before?
December 30th, 2009 at 3:45 pm
There’s no such thing as “permanent, dry, lubricity”.
But you can get awful close.
The real advantage of wet lubes is that they fill voids, and provide a shear layer, so that imperfect surface finishing doesn’t cause too much more friction. Most thin coating dry lubes aren’t able to do that, and most thicker ones will wear or scrape off.
Also, wet lubes hold particulates in suspension; which is both and advantage, and a disadvantage. It prevents those particulates from blowing into small passages, cracks etc… and becoming permanently or persistently embedded in the metal; but those particulates can also build up in the suspension until the lubricant is no longer lubricating.
So there’s some tradeoffs there; the primary one being, striking the balance between thickness of the coating, evenness of lubricity, and durability.
However, if you provide the proper surface finish (a fairly fine level of preliminary finish, followed by a small size media blast), and then use a hard baked, or hard embedding dry lube, you can get a VERY durable coating. Perhaps, something that can take as many rounds through as the expected useful lifetime of the part (5,000 rounds for a bolt, 20,000 for a carrier).