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PSPRV6A(at)aol.com
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 Posted: Tue Sep 25, 2007 11:14 am Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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Fly cutter hints: Yes, The fly cutter can be a loose cannon, but done right it can be tamed. First, mark all the centers carefully and drill (not with the fly cutter) 1/4". Drill the ribs undersize and ream to 1/4" if you have a reamer. Fit the fly cutter with a 1/4" SMOOTH pin NOT a drill bit. Grind the cutter blade to a narrow cut, about .050 at its outer edge. Use only about a 7 degree clearance angle.
Set up a sturdy board clamped to your drill press table and drill about 15/64 and then "burn" to 1/4" with a smooth pin. A few drops of oil in the hole will help. This will give a firm outboard pilot for fly-cutting. Now mount up your fly cutter and float the SMOOTH pilot pin into the rib hole and into the board. Clamp the rib to the board and only now start the drill press. Use rather slow speed, but you may feed quite firmly until near breakthru. A touch of oil will help but is not always needed. This makes fly cuttin a piece of cake! Good luck,. Paul S. Petersen
Minnetonka MN RV6A nearly complete with son Eric
See what's new="_blank">Make AOL Your Homepage.
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jpl(at)showpage.org
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| Posted: Tue Sep 25, 2007 12:41 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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You know, I never had a problem with my fly cutter, and I was a lot
less cautious than this. I normally run it on the slowest setting on
my drill press, but I even used it with a variable-speed hand drill.
With the hand drill, I was still careful and I went slowly.
When using a hand drill, you can feel when something isn't going
right and can adjust accordingly.
So, I'm not sure what the dangers are, as long as you respect the
tool. Did I just get lucky?
-Joe
On Sep 25, 2007, at 2:08 PM, PSPRV6A(at)aol.com wrote:
| Quote: | Fly cutter hints: Yes, The fly cutter can be a loose cannon,
but done right it can be tamed. First, mark all the centers
carefully and drill (not with the fly cutter) 1/4". Drill the ribs
undersize and ream to 1/4" if you have a reamer. Fit the fly
cutter with a 1/4" SMOOTH pin NOT a drill bit. Grind the cutter
blade to a narrow cut, about .050 at its outer edge. Use only
about a 7 degree clearance angle.
Set up a sturdy board clamped to your drill press table and
drill about 15/64 and then "burn" to 1/4" with a smooth pin. A few
drops of oil in the hole will help. This will give a firm outboard
pilot for fly-cutting. Now mount up your fly cutter and float the
SMOOTH pilot pin into the rib hole and into the board. Clamp the
rib to the board and only now start the drill press. Use rather
slow speed, but you may feed quite firmly until near breakthru. A
touch of oil will help but is not always needed. This makes fly
cuttin a piece of
cake!
Good luck,. Paul S. Petersen
Minnetonka MN RV6A nearly complete with son Eric
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jan(at)claver.demon.co.uk
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| Posted: Tue Sep 25, 2007 1:10 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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You definitely got lucky ... A hand drill and a fly cutter does not go
together ..
Or maybe you are just shit hot with a fly cutter  ... I would go with the
method described below ... Its very similar to what I did when I did my RV6
spar and all my ribs... (not the tank ribs)
Photo show my cutter (the disk is removed) ...Slow speed and a back stop
for the rib / spar
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jan(at)claver.demon.co.uk
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| Posted: Tue Sep 25, 2007 1:14 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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A fast way to clean up the holes after cutting out the disk ...
Jan
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Terry Watson
Joined: 09 Jan 2006
Posts: 290
Location: Seattle, WA USA
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| Posted: Tue Sep 25, 2007 1:18 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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I find that a fly cutter can be safely used in an electric drill motor, IF
used carefully and IF you set the clutch to slip if it snags. I would be
very hesitant to try it with a big drill motor (lots of power) and no
clutch.
Terry
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n616tb(at)btsapps.com
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| Posted: Tue Sep 25, 2007 1:27 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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Isn't a flycutter a series of high speed snags? About two per revolution.
Do Not Archive
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gcomfo(at)tc3net.com
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| Posted: Tue Sep 25, 2007 5:38 pm Post subject: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters |
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[quote]
To: rv-list(at)matronics.com
Subject: Re: RV-List Digest: 9 Msgs - 09/24/07 Fly cutters
Fly cutter hints: Yes, The fly cutter can be a loose cannon, but done right it can be tamed. First, mark all the centers carefully and drill (not with the fly cutter) 1/4". Drill the ribs undersize and ream to 1/4" if you have a reamer. Fit the fly cutter with a 1/4" SMOOTH pin NOT a drill bit. Grind the cutter blade to a narrow cut, about .050 at its outer edge. Use only about a 7 degree clearance angle.
Minnetonka MN RV6A nearly complete with son Eric
Better yet is a flycutter with a 3/8" integral pilot. Stanley makes (made) one. Works very well.
Gordon Comfort
N363GC
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