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raymondj(at)frontiernet.n Guest
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Posted: Fri Mar 30, 2007 9:51 am Post subject: deburing holes |
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Greetings Tom,
"As always, take advice with a grain of salt, no matter what source it is
from. I also learned that ZAC does NOT recommend using a 1/2" drill bit to
debur holes, as is presented in the metalworking 101 DVD."
Did ZAC recommend a method for deburing holes?
Raymond Julian
Kettle River, MN
do not archive
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tommylutz(at)gmail.com Guest
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Posted: Fri Mar 30, 2007 9:59 am Post subject: deburing holes |
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Yes. They recommended using a file, and pointed out that scuffs in the aluminum are OK since this needs to be done for corrosion protection application anyway.
On 3/30/07, raymondj <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)> wrote: [quote]--> Zenith-List message posted by: "raymondj" <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)>
Greetings Tom,
"As always, take advice with a grain of salt, no matter what source it is
from. I also learned that ZAC does NOT recommend using a 1/2" drill bit to
debur holes, as is presented in the metalworking 101 DVD."
[b]
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Gig Giacona
Joined: 10 Jan 2006 Posts: 1416 Location: El Dorado Arkansas USA
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Posted: Fri Mar 30, 2007 10:49 am Post subject: Re: deburing holes |
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When I went through the Zenith Rudder Workshop they showed me both ways.
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_________________ W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR |
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planecrazydld(at)yahoo.co Guest
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Posted: Fri Mar 30, 2007 12:33 pm Post subject: deburing holes |
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"scuffs" are indeed usually OK because they can be blended during a ScotchBrite session. The problem with using a file for deburring is that anyone doing this has a tendency to put gouges of some depth in the details parallel to the fastener line. Those gouges are not very likely to cause a problem in the short run but they are the source of massive problems over time as they are fatigue no-no's.
Probably the best way to take care of the problem is by using VERY sharp bits, and using them lubricated. The ever popular Boelube is one choice and what we used at Cessna and Lear Experimental was beeswax - just warm the bit and drill the block every so many holes. Using as many clecos as you own is also smart as the tighter the sheared surface between the details being drilled, the better for fit, burr generation, and everything else. The sharp bit generates cleaner holes with less burrs to start with so you have less worrys about countersinkinghte hoels if you do use the large drill for derurring.
If you decide to use a large drill, the 1/2" is way too big because you want the web at the center of the bit to be 75% of the diameter of the hole being deburred or less. For most. holes a 1/4" bit is ample; wrap the shank with a thick build up of masking tape and it is easier to control. If you spend some time with a magnifier and a light, you can learn to feel what is a good deburr and what is a drill bit angled countersink. The bit used for deburring should be very sharp as well and should be spun lightly in the fingers to remove the burr. Stay on the hole axis, normal to the local contour at the hole location. Deburring should remove any material standing proud of the plane of the face drilled - dull drills deflect substantially more materrial out of plane and at a greater diameter.
Tom Lutz <tommylutz(at)gmail.com> wrote:
[quote]Yes. They recommended using a file, and pointed out that scuffs in the aluminum are OK since this needs to be done for corrosion protection application anyway.
On 3/30/07, raymondj <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)> wrote: [quote]--> Zenith-List message posted by: "raymondj" <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)>
Greetings Tom,
"As always, take advice with a grain of salt, no matter what source it is
from. I also learned that ZAC does NOT recommend using a 1/2" drill bit to
debur holes, as is presented in the metalworking 101 DVD." Zodiac 601XL/Corvair?
8:00? 8:25? 8:40? [url= http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news] Find a flick[/url] in no time
with the[url= http://tools.search.yahoo.com/shortcuts/?fr=oni_on_mail&#news]Yahoo! Search movie showtime shortcut.[/url] [quote][b]
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Ron Lendon
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Joined: 10 Jan 2006 Posts: 685 Location: Clinton Twp., MI
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Posted: Fri Mar 30, 2007 1:41 pm Post subject: Re: deburing holes |
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I use a vixen file that has been prepared for this type of work. Lightly radius the length and ends. That helps prevent the gouging. Also a light touch helps when using the vixen file.
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_________________ Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
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ashontz
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Joined: 27 Dec 2006 Posts: 723
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Posted: Mon Apr 02, 2007 8:56 am Post subject: Re: deburing holes |
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Gig Giacona wrote: | When I went through the Zenith Rudder Workshop they showed me both ways. |
In my best practices guide from Zenith they say you can use a large drill. I don't anymore though. I use die grnider with a Scotch-Brite pad or in limited in work area, a file laid flat.
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Float Flyr
![](images/avatars/6347796944bf72a583fa4.jpg)
Joined: 19 Jul 2006 Posts: 2704 Location: Campbellton, Newfoundland
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Posted: Mon Apr 02, 2007 2:23 pm Post subject: deburing holes |
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I generally use a drill bit somewhat larger than the hole and just turn it
back and forth between my fingers just enough to remove the burrs. Not
enough to chamfer the holes. I found this faster than using the commercial
de burring bits. Occasionally I would use one of the inside deburring tools
when getting at the back of the hole was either difficult or down right
impossible. Deburring with a drill is awkward and there is a good chance of
chamfering a hole.
Noel
[quote] --
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_________________ Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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Malcolm.HUNT(at)networkra Guest
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Posted: Mon Apr 02, 2007 11:53 pm Post subject: deburing holes |
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Dear List
I use a hand countersink which is a rose countersink bit in a plastic
handle and cost equivalent of $8 in UK.
Only the slightest pressure is required leaving a hole perfectly
de-burred without risk of damage to the face of the sheet. Works on
4130 but a little more pressure required.
I works for me.
Malcolm Hunt
CH601XL plans builder in England
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pmaxpmax(at)HOTMAIL.COM Guest
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Posted: Tue Apr 03, 2007 4:59 am Post subject: deburing holes |
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Simplicity is the key in these small tasks. Over-thinking is the enemy.
I used a 1/4 inch bit, straight from the hardware store, spun in the fingers supplied the Lord and my Momma. For pieces that won't show, like the inside of a skin, it's quicker to run a file over all the holes at once.� Works like a charm and no fancy tools to buy.
Phil Maxson
601XL/Corvair
Northwest New Jersey
125 hours - Knocking the rust off my flying skills.
> Subject: RE: Re: deburing holes
[quote] Date: Tue, 3 Apr 2007 08:46:27 +0100
From: Malcolm.HUNT(at)networkrail.co.uk
To: zenith-list(at)matronics.com
--> Zenith-List message posted by: "Hunt Malcolm" <Malcolm.HUNT(at)networkrail.co.uk>
Dear List
I use a hand countersink which is a rose countersink bit in a plastic
handle and cost equivalent of $8 in UK.
Only the slightest pressure is required leaving a hole perfectly
de-burred without risk of damage to the face of the sheet. Works on
4130 but a little more pressure required.
I works for me.
Malcolm Hunt
CH601XL plans builder in England
--
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dbrown(at)avecc.com Guest
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Posted: Tue Apr 03, 2007 5:03 am Post subject: deburing holes |
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I take a fine file, break off about a one inch piece, slightly radius
all sides and corners, slide it around like a hockey puck. Works great.
David
I generally use a drill bit somewhat larger than the hole and just turn
it
back and forth between my fingers just enough to remove the burrs. Not
enough to chamfer the holes. I found this faster than using the
commercial
de burring bits. Occasionally I would use one of the inside deburring
tools
when getting at the back of the hole was either difficult or down right
impossible. Deburring with a drill is awkward and there is a good chance
of
chamfering a hole.
Noel
Quote: |
In my best practices guide from Zenith they say you can use a
large drill. I don't anymore though. I use die grnider with a
Scotch-Brite pad or in limited in work area, a file laid flat.
|
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milreed(at)directcon.net Guest
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Posted: Wed Apr 04, 2007 10:27 am Post subject: deburing holes |
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Using a metal abrasive wheel cut off saw, I shorten a drill as needed and use in some tight places. Apply friction tape. Will now cut up a file, sounds like a good idea. What's a hocky puck? Sorry aboot that.
Mil
[quote][b]
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