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, 07:48 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 |
It only took a couple of hours last night. I had spent the last 10 days at the shop, 12-14 hours a day and was just winding it down for the weekend.
Hell in the last week I built a complete manifold to tailpipe 2.5in exhaust for a Supercharged Scirocco, a solid motor mount system for the VW, and a custom front crossmember and half width radiator for a Civic. Anyway my new tranny showed up today so I am now back to my race car. Here is the bolt and the damage to the tubing: Attached image(s) |
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