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Posted: 7/18/2014 6:57:23 PM EDT
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Replacing my receiver on my ar 20 inch rifle
what is the the amount barrel torque???? 
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It is supposed to be 30 lb-ft for about three tightenings to seat the threads.
Then, final assembly is 35 lb-ft. But it really is where the hole for the gas tube lines up perfectly with one of the scollop's on the nut. That will very seldom turn out to be 35 lb-ft. |
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Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product.
Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. |
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Quoted:
Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product. Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. Could I use bearing grease or any kind of grease from auto part store 
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Quoted:
Could I use bearing grease or any kind of grease from auto part store Quoted:
Quoted:
Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product. Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. Could I use bearing grease or any kind of grease from auto part store I do, none of my rifles have blown up, disintegrated or fallen apart yet. 
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I do, none of my rifles have blown up, disintegrated or fallen apart yet.
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Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product. Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. Could I use bearing grease or any kind of grease from auto part store I do, none of my rifles have blown up, disintegrated or fallen apart yet.
They won't kaboom but if it is a graphite based product you are introducing an element that can accelerate corrosion between the nut and receiver threads. The graphite can cause galvanic corrosion. |
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Quoted:
They won't kaboom but if it is a graphite based product you are introducing an element that can accelerate corrosion between the nut and receiver threads. The graphite can cause galvanic corrosion. Quoted:
Quoted:
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Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product. Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. Could I use bearing grease or any kind of grease from auto part store I do, none of my rifles have blown up, disintegrated or fallen apart yet.
They won't kaboom but if it is a graphite based product you are introducing an element that can accelerate corrosion between the nut and receiver threads. The graphite can cause galvanic corrosion. Good point |
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Quoted:
They won't kaboom but if it is a graphite based product you are introducing an element that can accelerate corrosion between the nut and receiver threads. The graphite can cause galvanic corrosion. Quoted:
Quoted:
Quoted:
Quoted:
Use a moly based anti seize or grease such as Aeroshell 33. Do not use a graphite based product. Bring to 40 ft/lbs dry 3 times, this will burnish the threads so you get an accurate torque value. Remove the nut, clean and dry the threads on the receiver and nut. Apply anti seize and torque to 40 ft/lbs. Tighten further to align castle nut for the gas tube but do not exceed 80 ft/lbs. Never back off the nut to align the gas tube. If it will not line up without exceeding 80 ft/lbs try a different barrel nut. Use a torque wrench, don't forget to calculate for the offset of the barrel nut wrench. Could I use bearing grease or any kind of grease from auto part store I do, none of my rifles have blown up, disintegrated or fallen apart yet.
They won't kaboom but if it is a graphite based product you are introducing an element that can accelerate corrosion between the nut and receiver threads. The graphite can cause galvanic corrosion. I don' use Graphite based grease, just standard axle grease. |
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