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Old 05-19-2013, 02:07 PM
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Driveshaft dent

Hi
My driveshaft has a dent in it, which is 1 inch long and about
1/8 inch deep should I have any worries over this? Is there a
Way I can pull dent out? I have oxy/acetylene gear!
Thanks in advance
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Old 05-19-2013, 02:19 PM
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As long as dent/impact hasn't bent shaft. You can weld a nail to the center of dent. Then pull dent out with a claw hammer and a couple of flat boards. Then grind off nail.
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Old 05-19-2013, 02:24 PM
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Thanks for quick reply! what do you mean by flat boards? sorry had a long day!
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Old 05-19-2013, 02:28 PM
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Dont weld on the tube, it will cause the tube to warp.
If the shaft is for high speed use, it will probably vibrate.
If its for a dump truck, it will be fine.
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Old 05-19-2013, 03:37 PM
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Quote:
Originally Posted by dave350v8 View Post
Thanks for quick reply! what do you mean by flat boards? sorry had a long day!


Use the boards to prevent putting more dents in shaft. Place board between claws of hammer and shaft so prying action is on the board.

I have done this on street cars and had no problems.
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Old 05-19-2013, 03:40 PM
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Quote:
Originally Posted by lmsport View Post
Dont weld on the tube, it will cause the tube to warp.
If the shaft is for high speed use, it will probably vibrate.
If its for a dump truck, it will be fine.
A nail tacked onto a 3" driveshaft would warp it then? Im shocked, I would
never imagine it would cause that much distortion?
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Old 05-19-2013, 03:43 PM
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Quote:
Originally Posted by BOBCRMAN@aol.com View Post
Use the boards to prevent putting more dents in shaft. Place board between claws of hammer and shaft so prying action is on the board.

I have done this on street cars and had no problems.
thanks for that mate, I thought you meant that!
Dave
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Old 05-19-2013, 03:44 PM
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Quote:
Originally Posted by dave350v8 View Post
A nail tacked onto a 3" driveshaft would warp it then? Im shocked, I would
never imagine it would cause that much distortion?
It won't. .......
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Old 05-19-2013, 03:53 PM
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Originally Posted by BOBCRMAN@aol.com View Post
It won't. .......
Didn't think it would, ive been a welder for at least 20 years now!
Thanks again!
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Old 05-19-2013, 03:54 PM
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Be careful hear fellas. I have watched my local drive line shop correct a drive shaft tube that was slightly warped by heating it in a small place to shrink it and make it straight. If heating it will shrink it enough to straighten it there is no doubt in my mind heating it by welding on it can also warp it enough to cause major issues.

John L
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Old 05-19-2013, 03:57 PM
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If it doesn't vibrate. Leave it a lone..
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Old 05-19-2013, 04:01 PM
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[QUOTE=John long;1676840]Be careful hear fellas. I have watched my local drive line shop correct a drive shaft tube that was slightly warped by heating it in a small place to shrink it and make it straight. If heating it will shrink it enough to straighten it there is no doubt in my mind heating it by welding on it can also warp it enough to cause major issues.

Point taken! thank you, are balance weights not tacked on? just a thought!
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Old 05-19-2013, 04:07 PM
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worrying over nothing?
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Old 05-19-2013, 04:08 PM
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Originally Posted by NEW INTERIORS View Post
If it doesn't vibrate. Leave it a lone..
The best idea thank you !!
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Old 05-19-2013, 04:23 PM
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[quote=dave350v8;1676846]
Quote:
Originally Posted by John long View Post
Be careful hear fellas. I have watched my local drive line shop correct a drive shaft tube that was slightly warped by heating it in a small place to shrink it and make it straight. If heating it will shrink it enough to straighten it there is no doubt in my mind heating it by welding on it can also warp it enough to cause major issues.

Point taken! thank you, are balance weights not tacked on? just a thought!
Yes they are but at the end of the tube. The issue would be if you welded in mid-tube where a very small amount of shrinkage could cause a significant amount of distortion.

Quote:
Originally Posted by NEW INTERIORS View Post
If it doesn't vibrate. Leave it a lone..
Agree with this 100%
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