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Old 09-01-2017, 08:02 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?

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Old 09-01-2017, 08:34 PM
alexe alexe is online now
Join Date: May 2013
Location: Temecula, CA
Posts: 237

Basic answer, Yes. You will notice that one side of the pre-punched holes have rough edges. Cleaning them up goes quick.
Alex Erdelyi
RV-12 #120758, N912AE
Flying as of 4/28/15
Paid through December, 2018
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Old 09-01-2017, 08:38 PM
Lititzflyer Lititzflyer is offline
Join Date: Dec 2011
Location: Lititz, PA
Posts: 6

Thanks Alex, I have been deburring everything thus far, was hoping to save a little time, will keep deburring...
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Old 09-01-2017, 08:50 PM
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vernon smith vernon smith is offline
Join Date: Jun 2017
Location: Naples FL
Posts: 130

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.
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Old 09-01-2017, 09:23 PM
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rongawer rongawer is offline
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 275
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: id=63659&referer=https%3A//

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.
Ron Gawer

- RV12, N975G, SN 120840, Build in progress...finishing up.
- BE58, N1975G, stimulating the economy one flight at a time.
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Old 09-01-2017, 10:22 PM
rvbuilder2002 rvbuilder2002 is offline
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,498

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.
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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Old 09-03-2017, 08:09 PM
AeroDog AeroDog is offline
Join Date: Aug 2011
Location: New London, NC (near Charlotte), Boulder, CO
Posts: 168

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?

I'm pretty sure that Synergy doesn't debur the pre-punched holes in the skins.
Empennage and fuselage kits complete
Wing kit compete, Finish kit nearly complete
RV-12 120593 N42KJ reserved
=VAF= dues paid 2018
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