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Deburring Blind Holes

 
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davevanlanen(at)sbcglobal
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PostPosted: Sun Apr 02, 2006 4:18 pm    Post subject: Deburring Blind Holes Reply with quote
Can anyone tell me how to debur a "blind" hole? For example, on the 601XL
rudder, we do not install the upper bearing mount brackets (6T4-3) until we
are ready to install the rudder on the fuselage. This involves drilling
through the spar ((6T4-4) from the front to mount these brackets. Since the
rudder is already closed, there is no way to debur the back side of these
holes in the spar.

Thanks,
Dave Van Lanen
Madison, WI
601XL

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agustafson(at)chartermi.n
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PostPosted: Sun Apr 02, 2006 5:50 pm    Post subject: Deburring Blind Holes Reply with quote
Dave

There are any number of deburing tools on the market, but as I often find,
the tool I make does a better job for my specific purpose. That being said,
I think some get carried away inventing or reinventing tools and spend lots
of time doing it. I make many tools, some for my 601 project and many for my
job, but I make prototypes (meaning I don't spend too much time on them till
I prove they work good. Most often I make several before I am satisfied but
none of them are time consuming till proven. Then MAYBE I will make a good
looking one. In my book "form follows function). All this to say, see what
you can come up with for a solution yourself.

Have fun!

Aaron
Iron Mountain MI
do not archive
Quote:
Can anyone tell me how to debur a "blind" hole?
Dave Van Lanen
Madison, WI
601XL


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pacificpainting(at)comcas
Guest
PostPosted: Sun Apr 02, 2006 5:54 pm    Post subject: Deburring Blind Holes Reply with quote
Dave,

There is supposed to be a tool that you can stick through the hole and
deburr the back side. I haven't used one and don't even know if they really
exist. If you look on page 15 of the new Cleveland Tool catalog there is a
hooked blade for the deburring tool they have that looks like it might work.
If you don't have a catalog look on www.CleavelandTool.com .

Dave in Salem
---

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jfmasell(at)optonline.net
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PostPosted: Sun Apr 02, 2006 6:04 pm    Post subject: Deburring Blind Holes Reply with quote
You can make a little tool that will go in the hole and scrap it clean. You
can use small debarring tools, consider a hook like instrument, take a wire
and bend it you can even use emery cloth wrapped around a thin piece of
wire. Not perfect but once you get a feel for it you will be able to clean
the back side. In addition if you use a sharp drill with very light pressure
their will be as cleaner hole that may not even need to be debarred!
John Maselli

A Computer Consulting

516-524-0420


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JERICKSON03E(at)aol.com
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PostPosted: Sun Apr 02, 2006 8:09 pm    Post subject: Deburring Blind Holes Reply with quote
In a message dated 4/2/2006 7:19:44 PM Central Daylight Time,
davevanlanen(at)sbcglobal.net writes:

<davevanlanen(at)sbcglobal.net>

Can anyone tell me how to debur a "blind" hole? For example, on the 601XL
rudder, we do not install the upper bearing mount brackets (6T4-3) until we
are ready to install the rudder on the fuselage. This involves drilling
through the spar ((6T4-4) from the front to mount these brackets. Since the
rudder is already closed, there is no way to debur the back side of these
holes in the spar.

Thanks,
Dave Van Lanen
Madison, WI
601XL
Dave, Take a look at www.mcmaster.com page2592. It has reversible
deburring tools at about 16 bucks. The one I have sleeps most of the time, works
well when it is needed.
Jerry

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pilotdna(at)hotmail.com
Guest
PostPosted: Sun Apr 02, 2006 8:09 pm    Post subject: Deburring Blind Holes Reply with quote
The tool you are looking for is generally called an "In-Out Deburrer." It
consists of an 1/8" shaft with a tiny spring loaded blade that sticks out of
one side. You chuck it in a drill motor, spin it up and push it through
then pull it back out of the hole. I got mine out of a dumpster behind a
Grumman plant (when I saw boxes of tools being dumped, I couldn't help it!).

Wicks Aircraft stocks it, search their site for "burraway" or just click the
option of "sheet metal" under the "tools" menu.

6061 is soft enough that you must be quick with the tool so that it doesn't
start to countersink or enlarge the hole.

Douglas Eatman
601XL/Corvair

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