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  #1  
Old 09-01-2017, 09:02 PM
Lititzflyer Lititzflyer is offline
 
Join Date: Dec 2011
Location: Lititz, PA
Posts: 6
Default Drburring

Basic question,

Do the prepunched holes in the RV 12 kit need to be deburred if they are not enlarged?

Kevin
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  #2  
Old 09-01-2017, 09:34 PM
alexe alexe is offline
 
Join Date: May 2013
Location: Temecula, CA
Posts: 222
Default

Basic answer, Yes. You will notice that one side of the pre-punched holes have rough edges. Cleaning them up goes quick.
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RV-12 #120758, N912AE
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  #3  
Old 09-01-2017, 09:38 PM
Lititzflyer Lititzflyer is offline
 
Join Date: Dec 2011
Location: Lititz, PA
Posts: 6
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Thanks Alex, I have been deburring everything thus far, was hoping to save a little time, will keep deburring...
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  #4  
Old 09-01-2017, 09:50 PM
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vernon smith vernon smith is offline
 
Join Date: Jun 2017
Location: Naples FL
Posts: 84
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These save lots and lots of time. If you read the instructions they say 800 RPM max, ignore this and you will tear up an eighty buck tool in short order.

https://cogsdill.com/product/burraway/
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  #5  
Old 09-01-2017, 10:23 PM
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rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 200
Default Don't overdo it

The reality is that it doesn't take a whole to lot debur a rivet hole; a quick wipe with a gloved finger or scotch-brite will do the job in most cases, especially the pre-punched holes. For the edges, here again, a fine grit scotch-brite pad does a very good job, or a simply a run or two with a rapid deburr tool like this does well: http://www.industrialboys.com/columnar.aspx?category_site=DTAP&cat_id=5644&prod_ id=63659&referer=https%3A//www.google.com/&compidcookieset&sessioncookieset

For holes drilled in heavier material, one twist of a properly sized counter sink does a great job.

I do use a deburr wheel on a bench grinder for those parts that I cut myself, or ones that are separated, in order to clean up the larger spikes, but my opinion is that you can really go overboard on deburring and exceed the need, which is simply to remove any burrs and have a smooth edge.
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- RV-12 N975G, SN 120840, Build in progress...finally on the finishing kit, so, something like 90% done and 90% left to go.
- 1975 B58 Baron, N1975G (a bottomless money pit that makes building an RV look like lunch money, but it's a great airplane, hauls the family and my wife likes two engines...go figure)
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  #6  
Old 09-01-2017, 11:22 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 6,971
Default

The more complex answer is "only if it seems necessary"

The Skins on the RV-12 are thin (only .020" thick) so a newbee builder over deburring would be making things worse than if they did no deburring at all.

There can occasionally be variation in hole quality depending on sharpness of punching tool, etc., so parts should be inspected, but if holes in a skin don't have enough bur to catch a finger nail on, it can be used as is.
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  #7  
Old 09-03-2017, 09:09 PM
AeroDog AeroDog is offline
 
Join Date: Aug 2011
Location: New London, NC (near Charlotte), Boulder, CO
Posts: 157
Default

Quote:
Originally Posted by Lititzflyer View Post
Basic question,

Do the prepunched holes in the RV 12 kit need to be deburred if they are not enlarged?

Kevin
I'm pretty sure that Synergy doesn't debur the pre-punched holes in the skins.
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