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Grinding off part of a bolt head in tight spot?

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PatrickW

Joined: 27 Oct 2006
Posts: 380
Location: Fort Worth, Texas

Posted: Tue Dec 16, 2008 2:08 pm Post subject: Grinding off part of a bolt head in tight spot?

In order to meet edge distance on 6T2-3 (rear horizontal stabilizer attach bracket), the bolt hole is close to the bend radius.  



The hole itself is not in the radius, but the edge of the head of the bolt would bear down on the curvature of the radius if tightened.



It does not appear to be possible to both have proper edge distance for the hole AND for the bold head to not hit the radius.



Is it ok to grind off some of the bolt head so that it doesn't interfere with the adjacent radius...?   Does the head of a bolt contribute to the strength of the bolt? 



I looked for guidance in AC43, and in the Construction Standards, and I searched this forum, but didn't find anything.



There's got to be a lot of fellow builders who've run into this exact same thing.  What did you do...?



Thanks,



- Pat



pwhoyt(at)yahoo.com

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daveaustin2(at)primus.ca
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Posted: Tue Dec 16, 2008 2:28 pm Post subject: Grinding off part of a bolt head in tight spot?

You could grind off enough of a washer under the bolt head so that there is 

no interference.

Dave Austin  601HDS - 912

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grs-pms(at)comcast.net
Guest

Posted: Tue Dec 16, 2008 2:42 pm Post subject: Grinding off part of a bolt head in tight spot?

Patrick:



How about a washer or two under the bolt head?  If necessary, you could 

grind off one edge of the washer. You might have to go to the next bolt 

length.



George Swinford



Do not archive

---

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JohnDRead(at)aol.com
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Posted: Tue Dec 16, 2008 8:24 pm Post subject: Grinding off part of a bolt head in tight spot?

It is not a good idea to grind off any part of the bolt head as it all  contributes to the tensile strength of the bolt and the joint. Use a washer  under the bolt head and file it away to clear the radius. A washer is only a  load spreader used this way. It does not contribute to the tensile strength of  the joint.

  

 John  Read



Phone: 303-648-3261

Fax: 303-648-3262

Cell: 719-494-4567   

  In a message dated 12/16/2008 3:10:33 P.M. Mountain Standard Time,  pwhoyt(at)yahoo.com writes:

  	  Quote: 	
		  -->    Zenith-List message posted by: "PatrickW" <pwhoyt(at)yahoo.com>



In    order to meet edge distance on 6T2-3 (rear horizontal stabilizer attach    bracket), the bolt hole is close to the bend radius.  



The hole    itself is not in the radius, but the edge of the head of the bolt would bear    down on the curvature of the radius if tightened.



It does not appear to    be possible to both have proper edge distance for the hole AND for the bold    head to not hit the radius.



Is it ok to grind off some of the bolt head    so that it doesn't interfere with the adjacent radius...?   Does the    head of a bolt contribute to the strength of the bolt? 



I looked for    guidance in AC43, and in the Construction Standards, and I searched this    forum, but didn't find anything.



There's got to be a lot of fellow    builders who've run into this exact same thing.  What did you    do...?



Thanks,



-    Pat



pwhoyt(at)yahoo.com



--------

Patrick

601XL/Corvair

N63PZ    (reserved)





Read this topic online    here:



http://forums.matronics.com/viewtopic.php?p=219674#219674

	






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