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Deburring Blind Holes

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davevanlanen(at)sbcglobal
Guest

Posted: Sun Apr 02, 2006 4:18 pm Post subject: Deburring Blind Holes

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
Guest

Posted: Sun Apr 02, 2006 5:50 pm Post subject: Deburring Blind Holes

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

Posted: Sun Apr 02, 2006 5:54 pm Post subject: Deburring Blind Holes

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
Guest

Posted: Sun Apr 02, 2006 6:04 pm Post subject: Deburring Blind Holes

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
Guest

Posted: Sun Apr 02, 2006 8:09 pm Post subject: Deburring Blind Holes

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

Posted: Sun Apr 02, 2006 8:09 pm Post subject: Deburring Blind Holes

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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