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Three flute drill

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msherman95632(at)yahoo.co
Guest

Posted: Mon Aug 14, 2006 9:45 am Post subject: Three flute drill

Tom H.



I looked on McMaster Carr's web site and all I could

find in a three flute drill is solid carbide and

$15.53 per drill.  I don't think a solid carbide drill

would be appropriate for a hand drill.



I think the possibility of cutting our drilling time

in half by not drilling a pilot hole would be of

interest to everyone, if the quality of the hole is

the same as with pilot drilling.



If you could provide me with a part number or link to

the part, that would be greatly appreciated.



Thanks in advance



Mark S.

701/912S

Always looking for a better way



do not archive



__________________________________________________

barcusc(at)comcast.net
Guest

Posted: Mon Aug 14, 2006 10:41 am Post subject: Three flute drill

I used carbide drills (Two flute) in the beginning, one for A-4 and one for 

A-5s, they lasted a long time. However, it did not seem like they were as 

sharp when new as the new high speed steel.



Clyde

601XL

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Kevin Bonds

Joined: 09 Jan 2006
Posts: 171
Location: Nashville, Tn

Posted: Mon Aug 14, 2006 11:33 am Post subject: Three flute drill

Yeah, and at $15 bucks apiece, don't drop it. I hear solid carbide drills

are very brittle and will shatter when dropped. Ouch.



Kevin Bonds



Nashville TN



601XL Corvair powered; Plans building.



Empennage done; working on wings and engine.



http://home.comcast.net/~kevinbonds



 



do not archive DO NOT ARCHIVE 



 

--

_________________
KevinBonds
Nashville, TN
Plans-building Zenith CH601XL w/Corvair Power
http://home.comcast.net/~kevinbonds

admin(at)arachnidrobotics
Guest

Posted: Mon Aug 14, 2006 11:54 am Post subject: Three flute drill

You're right, but they last nearly forever if you're careful with them.  A Drill Doctor is a good idea if you're spening more than $100 on your drill bits.  Honestly, I don't see the need to use such expensinve bits on an XL.  The standard High Speed, Two Flute Jobbers work just fine.  The holes can be slightly out of round, but the rivet system takes that into account.  Drill carefully and slowly, and your holes will come out round and clean without any pilot holes at all. 

    If someone just happens to be one of the people that can't seem to drill a round hole, stick with the pilot hole method.  It works fine, just takes more effort!



kevinbonds <kevinbonds(at)comcast.net> wrote:[quote] --> Zenith-List message posted by: "kevinbonds"  



Yeah, and at $15 bucks apiece, don't drop it. I hear solid carbide drills

are very brittle and will shatter when dropped. Ouch.



Kevin Bonds



Nashville TN



601XL Corvair powered; Plans building.



Empennage done; working on wings and engine.



http://home.comcast.net/~kevinbonds



 



do not archive DO NOT ARCHIVE 



 

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admin(at)arachnidrobotics
Guest

Posted: Mon Aug 14, 2006 11:54 am Post subject: Three flute drill

You're right, but they last nearly forever if you're careful with them.  A Drill Doctor is a good idea if you're spening more than $100 on your drill bits.  Honestly, I don't see the need to use such expensinve bits on an XL.  The standard High Speed, Two Flute Jobbers work just fine.  The holes can be slightly out of round, but the rivet system takes that into account.  Drill carefully and slowly, and your holes will come out round and clean without any pilot holes at all. 

    If someone just happens to be one of the people that can't seem to drill a round hole, stick with the pilot hole method.  It works fine, just takes more effort!



kevinbonds <kevinbonds(at)comcast.net> wrote:[quote] --> Zenith-List message posted by: "kevinbonds"  



Yeah, and at $15 bucks apiece, don't drop it. I hear solid carbide drills

are very brittle and will shatter when dropped. Ouch.



Kevin Bonds



Nashville TN



601XL Corvair powered; Plans building.



Empennage done; working on wings and engine.



http://home.comcast.net/~kevinbonds



 



do not archive DO NOT ARCHIVE 



 

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rstone4(at)hot.rr.com
Guest

Posted: Mon Aug 14, 2006 12:11 pm Post subject: Three flute drill

Hay Kevin,

     You said on your web site, you are not crazy........Of course you'r 

crazy just like the rest of us who like to build airplanes and do what the 

birds do better than they do it.  We fly higher than any bird in the world, 

We fly faster than any bird in the world, and with a proper paint job we 

look better than any bird in the world when we are doing it.  The only 

drawback is, they do it for free, we have to pay through the nose. LOL



Bob Stone, Harker Heights, Tx

     DO NOT ARCHIVE

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p.mulwitz(at)worldnet.att
Guest

Posted: Mon Aug 14, 2006 2:03 pm Post subject: Three flute drill

Yeah, but I would like to see you land your metal airplane on a tree branch !



Paul

do not archive

 	  Quote: 	
		  We fly higher than any bird in the world, We fly faster than any 

bird in the world, and with a proper paint job we look better than 

any bird in the world when we are doing it.

RWILBERS(at)tampabay.rr.c
Guest

Posted: Mon Aug 14, 2006 2:25 pm Post subject: Three flute drill

Clyde: You are right. Tungsten carbide drills, or tools for that matter, are

not as sharp as high speed steel because of the metallurgical structure of

the two totally dissimilar materials. However, the carbide drills are harder

and have a higher "red hardness" and higher wear resistance. 

The pecking order of drill hardness vs. sharpness is as follows: carbon

steel; molybdenum HSS; cobalt HSS; tungsten HSS; tungsten carbide and

ceramic. The carbon steel has a sharper edge when new, but wears out rapidly

in production application and so on up the line. Ceramic will last a

lifetime if you can get it to cut and not break. Go with a Cobalt HSS split

point with Titanium Nitride coating for the very best "middle ground".

3 flute drills require a "core" hole larger than the core diameter of the

drill, because 3 flute drills, by the nature of their geometry, cannot have

a chisel edge. 

For practical purposes when drilling aluminum, a NAS907 type B aircraft

drill will work fine and are cheap enough to throw away when dull.

Bet Regards.................Dick



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rstone4(at)hot.rr.com
Guest

Posted: Mon Aug 14, 2006 2:51 pm Post subject: Three flute drill

A HELOCOPTER COULD DO IT IF THE BRANCH WAS LARGE ENOUGH

 ---

lnk(at)iowatelecom.net
Guest

Posted: Mon Aug 14, 2006 3:18 pm Post subject: Three flute drill

Ahh, but helicopters don't really fly, they are just so  damn ugly that the Earth rejects them.

  

 Larry K, Iowa, XL wanna builder.

  

 do not archive



 [quote]         From: owner-zenith-list-server(at)matronics.com    [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Robert L.    Stone

Sent: Monday, August 14, 2006 5:51 PM

To:    zenith-list(at)matronics.com

Subject: Re: Three flute    drill

   

        A HELOCOPTER COULD DO IT IF THE BRANCH WAS LARGE ENOUGH

   ---

randy(at)n344rb.com
Guest

Posted: Mon Aug 14, 2006 3:39 pm Post subject: Three flute drill

They beat the air into submission!

  

 Randy

 XL Wings - Plans Only

 http://www.n344rb.com

  

 Do Not Archive

 [quote]   ---

jhstarn(at)verizon.net
Guest

Posted: Mon Aug 14, 2006 5:27 pm Post subject: Three flute drill

RIGHT ON, also: They just beat the air into submission.  

 Don't think so ? ?...then why does the air slam them on the  ground once the beating stops ? ?.  8*)  

 KABONG Do Not Archive

 [quote]   ---

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