Re: Can't remove axle nut - the saga continues - Saab 9000 Bulletin Board - Saabnet.com
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Re: Can't remove axle nut - the saga continues
Posted by yaofeng [Email] (more from yaofeng) on Sat, 10 Dec 2005 21:24:30
In Reply to: Can't remove axle nut - the saga continues, Ryan [Profile/Gallery]
, Sat, 10 Dec 2005 11:38:07
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I found it hard to believe. If you snap a 3/4" drive braeker bar on the square head, I don't think a 3/4" impact wrench will help you. It takes at lease 500 ft-lbs, very likely much more to shear a 3/4" drive head made of tool steel.
There should be plenty many engineers on this board. Using a simplistic shear failure at half the tensile yield stress of soft carbon steel, say yield stress of 36 ksi. The corner of the 3/4" drive head starts to yield at 300 ft-lbs. To snap the head off, the whole head of to yield. Plus tool steel probably have yield stress 60 ksi or more.
If I use 60 ksi yield stress, the corners of the 3/4" drive starts to yield at 500 ft-lbs. I need to go find the book in my office of the shape factor of a square section under torque. That will give you the torque capacity of a 3/4" drive head.
If you really snapped the 3/4" drive head, I suggest using Dremel to slit the nut because a 3/4" impact wrench will likely not help you. Neither will a 5 ft long breaker bar. Because the drive head is the weakest link.
posted by 69.248.96...
Posts in this Thread:
- Can't remove axle nut - the saga continues, Ryan , Sat, 10 Dec 2005 11:38:07
- Wow, such trouble from one nut, T. Christopher, Sun, 11 Dec 2005 15:37:21
- Go to Sears and try again, GaryJ, Sun, 11 Dec 2005 06:09:07
- way around liability issues, TML , Sat, 10 Dec 2005 22:40:03
- Re: Can't remove axle nut - the saga continues, KenManiac , Sat, 10 Dec 2005 22:27:20
- Re: Can't remove axle nut - the saga continues, yaofeng, Sat, 10 Dec 2005 21:24:30 <-- Viewing This Message
- Scanwest should be able to help you., Aaron Gilbert, Sat, 10 Dec 2005 21:23:03
- Breaker bar won't do, you need a sliding T-handle..., Street, Sat, 10 Dec 2005 14:23:14
- Re: Can't remove axle nut - no probs, Gabe from Sweden, Sat, 10 Dec 2005 13:55:01
- Re: Can't remove axle nut - the saga continues, andym, Sat, 10 Dec 2005 11:50:55
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