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  #1  
Old 01-20-2022, 07:55 AM
ctremie ctremie is offline
 
Join Date: Apr 2021
Location: Sulphur La
Posts: 15
Default Concerned about under dimpling, Please let me know your thoughts

I have a DRDT-2 , with dimple dies from ISham (Planetools.com), I have the drdt-2 setup to flex about 1/8th of an inch at the bottom of the stroke. But I am concerned about the dimples looking under dimpled. Thoughts?

Different dies maybe>?
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  #2  
Old 01-20-2022, 08:06 AM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,790
Default

I most definitely see under formed dimples.
It could be caused by the dimple dies, but in my opinion, the DRDT-2 is always going to produce dimples of lesser quality than other methods.
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Last edited by rvbuilder2002 : 01-20-2022 at 08:09 AM.
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  #3  
Old 01-20-2022, 08:17 AM
Nova RV Nova RV is offline
 
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Location: Leesburg, VA
Posts: 594
Default

Just need more pressure on the DRDT. Get some scrap alum and make practice dimples in it and adjust until there is no dishing around the dimple.
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Last edited by Nova RV : 01-20-2022 at 08:18 AM. Reason: added text
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  #4  
Old 01-20-2022, 08:22 AM
ctremie ctremie is offline
 
Join Date: Apr 2021
Location: Sulphur La
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The edges where done with Rivet Squeezer. What method do you like best?
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  #5  
Old 01-20-2022, 08:23 AM
ctremie ctremie is offline
 
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Thanks Chris will try
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  #6  
Old 01-20-2022, 08:41 AM
ctremie ctremie is offline
 
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Straight on they look good but when you get a distance away they seem to distort, is this normal
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  #7  
Old 01-20-2022, 08:41 AM
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wirejock wirejock is offline
 
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Location: Estes Park, CO
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Default Dimples

The dimples near your hand look better but still under. The ones at the top are very under dimpled.
I see no burnish marks. You may want to try some Cleveland dies.
I prefer a C-frame.
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Donated 12/01/2021, plus a little extra.
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  #8  
Old 01-20-2022, 08:58 AM
Bavafa Bavafa is offline
 
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Location: Sacramento, CA
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They are certainly under dimpled or not nearly as crisp of a dimple as they should be and I am with Scott 100%
You seem to be at the early stage of your build so still ways to go. It would be worthwhile to spend the $$ and time on a good dimpler and a good table/platform for it.
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  #9  
Old 01-20-2022, 09:00 AM
Pdp7427 Pdp7427 is offline
 
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Location: Georgia
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I’m FAR from any kind of expert. How do your dimples compare to the examples in the standard aircraft handbook or in the FAA Inspection and Repair Alterations book? I’m trying to reconcile why all of the books seem to prefer a dimple that only just accepts a flush rivet flush to skin while the forums always seem to prefer a deep dimple…?

Trying to learn myself.
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  #10  
Old 01-20-2022, 09:07 AM
ctremie ctremie is offline
 
Join Date: Apr 2021
Location: Sulphur La
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Quote:
Originally Posted by Bavafa View Post
They are certainly under dimpled or not nearly as crisp of a dimple as they should be and I am with Scott 100%
You seem to be at the early stage of your build so still ways to go. It would be worthwhile to spend the $$ and time on a good dimpler and a good table/platform for it.

So is the DRDT-2 and Isham Dimple dies not good? I also have it mounted on EAA workbench. What is your recommendations
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