Break Away Torque, HOw to calculate |
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Break Away Torque, HOw to calculate |
Brett W |
Mar 26 2006, 11:44 PM
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#1
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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 |
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? |
Brett W |
Mar 27 2006, 11:08 PM
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#2
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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 |
Sorry, the tubing is just a spacer because the bolt is shouldered and too long. It only deformed after we hammered on it with a 3/4 impact. I figured for my test fixture I would use a piece of square tubing to take up the gap evenly. It would be something very thick to keep it from deforming.
I built an intercooler for the Civic but it is too big and the outlets are kinda in the wrong place. So it will be going on the 914 race car as it is kind of a generic shaped intercooler. Attached image(s) |
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