 Break Away Torque, HOw to calculate |
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| Brett W |
 Mar 26 2006, 11:44 PM
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Advanced Member  Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None 
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We all know that the torque needed to loosen a fastener is usually higher than the torque at which the fastner is tightened. Is there a way to calculate this number.
I just got a new 3/8 Impact wrench and was doing some test with it. We torqued a 1in course thread bolt to 250 ft-lbs. Then used this impact to break it loose. It did it with no problems at 175 psi. Couldn't touch it at 90psi. ANy body know how to calculate that torque? |
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Posts in this topic
Brett W Break Away Torque Mar 26 2006, 11:44 PM
alpha434 Jeeze. I don't think that there is a way. Ther... Mar 26 2006, 11:47 PM Brett W That's what we figured. We oiled the bolt and... Mar 26 2006, 11:56 PM alpha434 Well, don't do it with the air gun. Use a torq... Mar 27 2006, 12:02 AM Brett W I am torquing the nut with the torque wrench and t... Mar 27 2006, 12:10 AM alpha434 No no. Use the torque wrench on both operations. T... Mar 27 2006, 01:00 AM McMark It sounds like Brett is just trying to verify the ... Mar 27 2006, 01:15 AM alpha434 Mar 27 2006, 01:33 AM McMark You're right I guess I didn't finish my th... Mar 27 2006, 01:46 AM Joe Ricard Hmm, SO who really gives a rat's ass how much... Mar 27 2006, 06:18 AM groot Brett,
Considering we test all joints for clampin... Mar 27 2006, 07:06 AM Brett W I got these two new impact wrenches that are suppo... Mar 27 2006, 11:02 AM groot You definitely have too much time on your hands. H... Mar 27 2006, 11:47 AM Brett W It only took a couple of hours last night. I had ... Mar 27 2006, 07:48 PM jd74914 Hey Brett, is there anything special about the hon... Mar 27 2006, 07:59 PM Cap'n Krusty No way would I subject my air tools to 175 PSI. W... Mar 27 2006, 08:05 PM Brett W I normally leave our reg set at 100psi. We were j... Mar 27 2006, 10:05 PM jd74914 <... Mar 27 2006, 10:14 PM LvSteveH Actually, I think a fairly predictable formula cou... Mar 27 2006, 10:24 PM Brett W Sorry, the tubing is just a spacer because the bol... Mar 27 2006, 11:08 PM jd74914 Nice. Whats the advantage of building an intercool... Mar 27 2006, 11:29 PM Porcharu   |
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