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Post by rexxer on Jan 26, 2009 16:53:23 GMT -5
What is the best way to know how tight to torque barrel nut? I see that some wrenches have a square in them for a torque wrench but the lever arm would be longer for a true reading! Thanks Rex
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Post by rossman40 on Jan 26, 2009 17:11:24 GMT -5
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Post by rexxer on Jan 26, 2009 17:34:27 GMT -5
You always amaze me Rossman! So now that we have a formula to determine the mechanical advantage of the lever arm we must now have a goal of ___________ft/lbs at the nut? ;D
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Post by blackhawk7204 on Jan 26, 2009 18:08:57 GMT -5
The instructions that came with my wrench says to put the torque wrench in the hole next to the nut, not on the other end.
It would still have a small advantage compared to a socket though. That would make it a little tighter than the torque wrench indicates. Would that cause any problems?
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Post by rossman40 on Jan 26, 2009 20:33:04 GMT -5
IIRC the factory torques them at 70 ftlbs and that is maybe why so many are bear to get loose. I go for about 50.
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Post by rexxer on Jan 26, 2009 20:55:21 GMT -5
Thanks Rossman--I have heard many say they are a bear to get off! 50 sounds good with just a little smidge more!
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Post by DBinNY on Jan 26, 2009 21:21:37 GMT -5
You always amaze me Rossman! So now that we have a formula to determine the mechanical advantage of the lever arm we must now have a goal of ___________ft/lbs at the nut? ;D Not Rossman but I did take physics a long, long time ago. IIRC torque is equal to the length of the lever (or, in this case wrench handle) (feet) times the amount of force applied (lbs). |
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Post by sw on Jan 26, 2009 22:36:54 GMT -5
I've found that with the barrel in a barrel vise with the barrel wrench on the nut and at 90 degrees out, hit it sharply with a hammer to break it loose. It's a lot like a new car/oil filter: don't ever tighten the filter your put on nearly as much as the one from the factory was.
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Post by rbinar on Jan 27, 2009 5:02:11 GMT -5
8-)I have always found 50 lbs to be plenty, I have also given a rule of thumb for those who don't have a way to measure the torque.
I can tell you if you clamp the wrench and use the receiver clamp as a wrench it will work fine if you use near all the strengt of an average man with one hand. If you are strong not all your strength if you are weak use about a 4" cheater bar. It takes some judgement (if you've never tightened a torqued bolt get help) and I agree it is not as good as a torque wrench but it has and will work for most shooters.
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