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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: onlysmith&wesson]
#9178480
01/29/25 04:43 PM
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Joined: Apr 2007
Posts: 62,857
BOBO the Clown
kind of a big deal
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kind of a big deal
Joined: Apr 2007
Posts: 62,857 |
Engineer who designs aircraft parts here. Been doing it almost 20 years now.
Yes, you absolutely can over-torque fasteners by wet installing to a spec for dry install. Friction reduces the torque needed to reach a certain clamp load, which is all you're trying to do. does wet mounting ring or base increase torque enough to matter though? Your question is relevant to the base to the rifle, and the rings to the base and not ring to ring. Correct? I’m more curious as to using loktite/paint etc in screws them selves. Everything has a break point but does wet vs dry screw torque matter in rings? More asking on the integrity of ring to ring and base clamp screws/bolt. The wet rail isn’t an integrity issue, you aren’t going to crush the rail. I have seen other base clamps break at 45lb dry and wet(torque spec per CS was 25-30lbs) . Not the screw, and not the female threads on back side but base clamp it’s self , wet/dry torque difference was to minimal to measure Example: I have rings that come with threadlocker, torque spec is 45base /25lbs top and since it comes with threadlocker/loctite/paint etc that would be a wet spec, but they have said it doesn’t matter. Have other rings from another company that are 68in base 25ring, you call them and ask them dry or wet, they say spec is spec and the same. So is there a significant difference in wet vs dry torque specs on scope rings components them selves, my idiot testing from assuming torque specs on some lower torque spec rings says no, but that’s hardly a large sample size. .
Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much, b/c they know not victory nor defeat"- #26 TR
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: patriot07]
#9178487
01/29/25 05:07 PM
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Joined: Apr 2007
Posts: 62,857
BOBO the Clown
kind of a big deal
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kind of a big deal
Joined: Apr 2007
Posts: 62,857 |
Engineer who designs aircraft parts here. Been doing it almost 20 years now.
Yes, you absolutely can over-torque fasteners by wet installing to a spec for dry install. Friction reduces the torque needed to reach a certain clamp load, which is all you're trying to do. does wet mounting ring or base increase torque enough to matter though? Not on the screw threads? You mean lubing the rails? I don't have an analysis to confirm, but I don't think that would impact clamp force in a meaningful way. Sorry On screw threads, specifically.
Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much, b/c they know not victory nor defeat"- #26 TR
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: BOBO the Clown]
#9178493
01/29/25 05:14 PM
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Joined: Nov 2011
Posts: 4,943
patriot07
Extreme Tracker
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Extreme Tracker
Joined: Nov 2011
Posts: 4,943 |
Engineer who designs aircraft parts here. Been doing it almost 20 years now.
Yes, you absolutely can over-torque fasteners by wet installing to a spec for dry install. Friction reduces the torque needed to reach a certain clamp load, which is all you're trying to do. does wet mounting ring or base increase torque enough to matter though? Not on the screw threads? You mean lubing the rails? I don't have an analysis to confirm, but I don't think that would impact clamp force in a meaningful way. Sorry On screw threads, specifically. Yes anytime you lube the screw threads, it's going to decrease the torque required to accomplish the same clamp force.
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: Pig_Popper]
#9178505
01/29/25 05:33 PM
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Joined: Oct 2009
Posts: 12,778
wp75169
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Patriot07 is correct about above.
I think the scope of the original issue is friction from rings to base on a picatinny rail not allowing the rings to seat properly at the correct torque spec. Then when dropped etc (additional force) they do seat, causing a shift in windage.
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: Pig_Popper]
#9178515
01/29/25 05:48 PM
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Joined: Apr 2007
Posts: 62,857
BOBO the Clown
kind of a big deal
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kind of a big deal
Joined: Apr 2007
Posts: 62,857 |
Yes anytime you lube the screw threads, it's going to decrease the torque required to accomplish the same clamp force.
Yes but to a degree that it actually matters?
Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much, b/c they know not victory nor defeat"- #26 TR
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: BOBO the Clown]
#9179454
01/31/25 12:37 PM
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Joined: Nov 2011
Posts: 4,943
patriot07
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Yes anytime you lube the screw threads, it's going to decrease the torque required to accomplish the same clamp force.
Yes but to a degree that it actually matters? That's impossible to say because it's situation-specific. I think the concern that wp75169 mentions above is very legitimate. Rings already don't use a ton of torque. I think it would be absolutely possible to not set a base "properly" on the rail and have it bind a little bit until it's jarred by a heavy recoiling round or the rifle being dropped, but if you'd taken time to set it correctly, or possibly have had the base lubed up where it didn't bind to start with, it could have prevented it.
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: Jhop]
#9180074
02/02/25 12:19 AM
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Joined: Mar 2010
Posts: 801
Jhop
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The OP is talking about QD mounts on thermals like Bobro and American Defense. Not a traditional pic rail and screw ring setup. I’ve never tried wet mounting it and have always made sure it’s free from any lubricant. Everything works great dry so I don’t see a need to change anything up, Isn't hard to test. I just finished testing a new mount for a new thermal company. I used TW25B with the mount. Managed to keep a 1.4 inch shot group with six 5 round test groups using their mount and thermal. I used a small handwarmer as the target, base magnification is 3.2 on the thermal. With a day scope, same rifle and ammunition, I shot a .8 with a BoBro mount without removing it between shots. Guess i could repeat the test with the Bobro and day scope. I repeated this test with a day scope mounted in a BoBro engineering mount. I shot 5 5rd groups removing the scope/mount between shot groups with a non-lubed rail/mount. The group opened up to a 1.1 inch group for the 25 rounds fired. I repeated the test but slightly lubed the picatinny rail where the BroBo mount contacted it. Interestingly the group shifted to the right by .2 inches. After the 25 rounds were fired, the group was slightly smaller at just over 1.05 inches. The group difference, probably is due to me shooting. The center of impact shift is up for debate. The Brobo mount is self-adjusting. The brobo mount is probably 10 years old and well-worn in as is the AR-15 I tested it with. There might be a larger change with a new mount and or picatinny rail.
Last edited by Jhop; 02/02/25 12:21 AM.
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: Pig_Popper]
#9183251
02/07/25 10:59 PM
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Joined: Mar 2010
Posts: 15,439
ntxtrapper
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I tested it yesterday evening with zero wind and a very new Bobro. No difference and it zeroed back perfectly either way.
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Re: Are you serious ? No frickin way . . . Lube the pic rail (or other type of base) to the scope rings ?!?!?!
[Re: Pig_Popper]
#9183291
02/08/25 12:40 AM
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Joined: Aug 2015
Posts: 4,217
Pig_Popper
OP
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I appreciate you guys posting your results from testing
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