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  #1  
Old 03-17-2016, 08:02 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,456
Default Need a magic rivet

I have a dimple that is too deep on my turtle deck skin. The rivet sits just below the surface and it won't pull down. Does anyone have a clever trick, like some sort of shim under a rivet head, to make it stick proud, or a rivet with a slightly larger head? Or some new swear words that work better than the ones I am using?

thanks
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  #2  
Old 03-17-2016, 08:11 AM
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airguy airguy is offline
 
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Step it up to the next size?
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Greg Niehues - SEL, IFR, Repairman Cert.
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  #3  
Old 03-17-2016, 08:13 AM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by sblack View Post
I have a dimple that is too deep on my turtle deck skin. The rivet sits just below the surface and it won't pull down. Does anyone have a clever trick, like some sort of shim under a rivet head, to make it stick proud, or a rivet with a slightly larger head? Or some new swear words that work better than the ones I am using?

thanks
A little more info would be helpful....
Since it is not really possible to dimple countersink too deep, is this a hole that you machine countersink? Was it done in an incorrect size (1/8" vs 3/32")?
Etc.
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  #4  
Old 03-17-2016, 09:31 AM
Stoo Stoo is offline
 
Join Date: May 2006
Location: LL10, Naperville, IL.
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Easy to fix if you have access to a lathe. Chuck up a long -4 and machine it down to -3 with a larger head.
Stewart Willoughby, 6, FWF.
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  #5  
Old 03-17-2016, 10:09 AM
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fl-mike fl-mike is offline
 
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Re-dimple it?
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  #6  
Old 03-17-2016, 11:23 AM
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Raymo Raymo is offline
 
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Default Unclear...

What is meant by "won't pull down?"
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  #7  
Old 03-17-2016, 11:53 AM
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Mel Mel is offline
 
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Location: Dallas area
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Quote:
Originally Posted by Raymo View Post
What is meant by "won't pull down?"
I'm sure he means that the rivet sits flush with the skin and won't drive down into the dimple. Since the rivet set stops at the skin surface, it won't push the rivet down below the surface.
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Mel Asberry, DAR since the last century.
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  #8  
Old 03-17-2016, 11:57 AM
sblack sblack is offline
 
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Location: Montreal
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It was dimpled, then I shimmed a poor fitting bulkhead with filled epoxy and used a counterskink to clean out the dimple. Sort of a liquid shim, which works very well. But I over did the cleaning out part. It really doesn't take much. a thou or 2 and the rivet sits too low. I could turn down a rivet I suppose. I have a lathe. But I was wondering if there were any other tricks of the trade out there.
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  #9  
Old 03-17-2016, 12:06 PM
clutch22 clutch22 is offline
 
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Location: Bartlesville, OK
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It seems that an easy fix would be to drill it up to .128", shoot a #4 rivet in it, then shave the head flush to the surface. Most areas have sufficient edge distance (~.25") for a 4.
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  #10  
Old 03-17-2016, 12:44 PM
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rvbuilder2002 rvbuilder2002 is offline
 
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In this type of situation I have used a small shim close the the diam of the rivet head.
I have only done this setting a rivet with a squeezer but with care it would probably work with a gin also. I would tape the spacer in place.

An easy way to make the spacers is with a Whitney punch, if you have one or can borrow one. Use the punched out portion of a hole punched in some scrap .016 material.
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Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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