Minimum torque > Build It Yourself

Posted: 12/27/2009 5:10:57 PM EDT

So I installed my barrel on my newest build tonight and it torqued just barely to 30lbs, attempting to torque to the next tube slot would have pushed it well past 80lbs.

So the most I can torque my nut is the lowest "they" reccomend.

Anyone have any experiance with this?

Advise? cautions?

Thanks

Posted: 12/27/2009 5:47:01 PM EDT

[#1]

try the tightening and loosening 3 times trick. It does make a difference.
My youngest son and I just put his first AR together this afternoon. After doing the repeat cycle it lined up perfect at between 58-60 lbs.

Posted: 12/27/2009 6:54:56 PM EDT

[#2]

What he said.

@ 30lbs it will shoot looser than that after a while. It may or may not affect the accuracy, but if you tighten and back it off a few times it will hit the next hole within spec, and not work looser than recommended. Don't forget the lithium grease, at least that is what I prefer, but any THIN grease will work.

Posted: 12/27/2009 8:00:08 PM EDT

[#3]

I used grease and torqued and retorqued quite a few times, it seems that 30lbs is where these threads were meant to line up

But has anyone ever experianced any issues from the minimum reccomended torque value?

Posted: 12/28/2009 3:10:05 AM EDT

[#4]

The specs are 30 to 80, your at 30, next hole would be over 80. You have lubed, tightened (tourqued) and loosened numerous times. You are within specs and good to go Better 30 than 100....<><....:)

Posted: 12/28/2009 9:58:54 AM EDT

[#5]

Quoted:
But has anyone ever experianced any issues from the minimum reccomended torque value?

My 20" A2 had a barrel nut line up right at 31 or 32 pounds. Since this was after doing the grease+tighten/loosen 3 times I figured it was good to go. It shot loose after 400 rounds or so. Only sign that something wasn't right was accuracy slowly went to shit.

While the barrel itself showed no signs of being loose, the barrel nut could be wobbled back and forth against the gas tube with finger pressure. Fixed it by ignoring the torque wrench and tightened it to the next notch.

Posted: 12/28/2009 10:30:12 AM EDT

[#6]

I would much rather have one at the lower end of the torque spec than the upper. I've had some that came out at 35 ft. lbs. No issues.

Posted: 12/28/2009 12:15:11 PM EDT

[#7]

Assuming the barrel fits properly to the face of the receiver I would try a different nut if possible. I can’t say it would fail at 30 ft/lbs, but if it were my weapon I would want it a little tighter on general principle.

Posted: 12/28/2009 3:08:21 PM EDT

[#8]

yeah, i would have rather been in the "just above" 30 ft lbs...i greased, loosened and tightened, but still ended up around the 70 ft lbs...kind of scared me a bit. i actually slipped off the barrel nit wrench too, marring some of the holes. good thing the handguard covers the nut well enough.

Posted: 12/28/2009 5:09:51 PM EDT

[#9]

Yeah I would like to be WELL within spec instead of just barely. I will try and retorque once again after I make it go boom a bit

Thanks for the input!

Posted: 12/29/2009 7:33:07 AM EDT

[#10]

Bucks13: I take it you have the type of wrench that uses pins, those always were a PITA. Started out with that type in the military, now I use one that has a molded head that engages multiple teeth, way better. Regarding barrel torque actually 70 ft/lbs does not bother me. I have never stripped the threads on an upper or found a loose barrel that had stripped threads. This is not a flame just an opinion. I have not dealt with enough loose barrels to be drawing any firm conclusions.

Warning

Confirm Action

[ARCHIVED THREAD] - Minimum torque

[ARCHIVED THREAD] - Minimum torque