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Posted: 2/25/2006 8:27:17 PM EDT
Im beginning my AR15 mechanics career, and need to ask aquestion, or two.

I recently put a YHM FFtube on my Armalite M15A2. I borrowed a GI Armorers tool, and the barrel nut would nut budge, with any amount of torque. It kept shearing the teeth off the nut. I then tried to use my THM FF tube tool, and it sheared a few more teeth off, and then broke the teeth off of the tool. I finally had to dremel the delta ring off, and take a pipe wrench to the barrel nut.

I had no problems reinstalling the new nut, and the tube, after I fixed my YHM FF Tube wrench( I simply cut the shanks off of three drill bits I had, and press fit them in the wrench. It actually works better now, as the teeth are a lot longer).

To my question. Why was that damn thing so tight? Was I doing something wrong?
Link Posted: 2/25/2006 8:33:28 PM EDT
old, seized.

should have heated it or threw it in the freezer
Link Posted: 2/25/2006 8:41:34 PM EDT
I did heat it, thats what i didnt understand. Never thought of the freezer, dunno why.
Link Posted: 2/25/2006 11:01:51 PM EDT
Link Posted: 2/26/2006 8:48:01 AM EDT
use the air duster in a can - turn can upside down - spray out the liquid (which is incredibly cold so don't give yourself frost burn - way way colder than a fridge) - use enough to get your differential shrinkage and there ya go. I use this technique on my wheel nuts that are torqued in too tight.

oh yeah, don't smoke while doing this unless you wanna blow up.
Link Posted: 2/26/2006 8:52:47 AM EDT

Originally Posted By gsghellokitty:
use the air duster in a can - turn can upside down - spray out the liquid (which is incredibly cold so don't give yourself frost burn - way way colder than a fridge) - use enough to get your differential shrinkage and there ya go. I use this technique on my wheel nuts that are torqued in too tight.

oh yeah, don't smoke while doing this unless you wanna blow up.




Excellent idea. Quite a bit faster than the ol' icebox. I'll have to try that next time.
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