Matronics Email Lists :: View topic - Reaming wing attach holes

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Reaming wing attach holes

Matronics Email Lists Forum Index -> Zenith601-List

View previous topic :: View next topic

Author Message

Cle

Joined: 19 Oct 2009
Posts: 5

Posted: Thu Oct 29, 2009 9:59 am Post subject: Reaming wing attach holes

Hello,

My name is Clemens living in Austria and I am building a 601XL from plans and I have a big problem finding  the correct reamer size for the wing attach holes.

For example if i buy a 1/4" reamer and ream the hole with it I can feel a small play when I inserting a AN4 Bolt in the hole - also small play with close tolerance bolts.

What do you think? Is that play okay? I think if you install this "heay", "long" wing you will not feel any play at the bolt - but I want to make sure befor I destroy a wing- and centerspar.

Thanks for your help,

Cle

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

psm(at)att.net
Guest

Posted: Thu Oct 29, 2009 11:42 am Post subject: Reaming wing attach holes

Hi Cle,



My experience is that a reamed 1/4 inch hole will provide a snug fit 

for a normal AN-4 bolt.  I used a hand reamer with slow and gentle 

force, after drilling perhaps 30/1000 inch smaller holes to reach 

this point.  Perhaps you are using a chucking reamer in a vibrating 

drill to do your reaming and this might give different results.



The good news is you are unlikely to destroy your plane at this 

point.  You can always go to larger, AN-5, bolts if necessary.  I am 

not an expert on this stuff, but I feel the 12 bolts used to hold the 

wings to the spar carry through are probably a bit much for 

safety.  If one or two of the bolts is not quite perfectly installed 

I think you will probable still be just fine.  Even if they are all a 

little bit loose before being torqued in place the torqued bolts will 

still provide a great deal of strength for the total structure.



Good luck,



Paul

XL awaiting engineering changes



At 10:59 AM 10/29/2009, you wrote:



 	  Quote: 	
		  Hello,

My name is Clemens living in Austria and I am building a 601XL from 

plans and I have a big problem finding  the correct reamer size for 

the wing attach holes.

For example if i buy a 1/4" reamer and ream the hole with it I can 

feel a small play when I inserting a AN4 Bolt in the hole - also 

small play with close tolerance bolts.

What do you think? Is that play okay? I think if you install this 

"heay", "long" wing you will not feel any play at the bolt - but I 

want to make sure befor I destroy a wing- and centerspar.

Thanks for your help,

Cle

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

Cle

Joined: 19 Oct 2009
Posts: 5

Posted: Thu Oct 29, 2009 11:55 am Post subject: Re: Reaming wing attach holes

Thanks Paul for your info.

You are right - I use a drill press for the reamers. I normally use a drill press for the reamers due to the reason that the hole looks more perfect if I use the drill press. If I drive my reamers with hand, chances are big that the surface of the hole gets corners. I don't know why this happens - maybe the reamers are not good for aluminum. If I use this reamers in steel I get perfect holes like with drill press + Aluminum.

Cle

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

psm(at)att.net
Guest

Posted: Thu Oct 29, 2009 12:57 pm Post subject: Reaming wing attach holes

Hi Cle,



Chucking reamers are best used in the big machining stations used in 

large factories. Hand reamers are much more appropriate for home builders.



Hand reamers are used in a tap holder much like a tap.  I use the 

ones with left spiral and right hand cut, but I suspect the ones with 

straight flutes work about the same.



Drilling holes in aluminum works best if you start with a pilot hole 

and make small increases in drill size until you reach the desired 

size.  If you make a big jump in size to a larger drill then you get 

odd shaped holes.  I didn't know this was less of a problem with 

steel, but I am not surprised.



Good luck,



Paul

XL awaiting engineering changes

At 12:55 PM 10/29/2009, you wrote:



 	  Quote: 	
		  Thanks Paul for your info.

You are right - I use a drill press for the reamers. I normally use 

a drill press for the reamers due to the reason that the hole looks 

more perfect if I use the drill press. If I drive my reamers with 

hand, chances are big that the surface of the hole gets corners. I 

don't know why this happens - maybe the reamers are not good for 

aluminum. If I use this reamers in steel I get perfect holes like 

with drill press + Aluminum.

Cle

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

daveaustin2(at)primus.ca
Guest

Posted: Thu Oct 29, 2009 12:57 pm Post subject: Reaming wing attach holes

Remember, when you install the wings, lift on the tips while tightening the 

bolts.  No matter how close you get the fit there will still be some slop.

Dave Austin  601HDS - 912

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

Cle

Joined: 19 Oct 2009
Posts: 5

Posted: Thu Oct 29, 2009 2:06 pm Post subject: Re: Reaming wing attach holes

Thanks Paul for your info about the pilot hole and continuing with larger drills but this is not new for me.

If I want a 1/4" reamed hole I always start with a small drill bit and normally end with a drill bit of a size of 6,1mm or 6,2mm. After drilling the hole looks always perfect. My reamers were sold as "hand reamers" but when I use them with a tap and turn them by hand into the hole, I get odd sized holes in aluminum. If I use them in my drill press I get perfect round holes but obviously a little bit too large holes.

Cle

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

rene(at)felker.com
Guest

Posted: Thu Oct 29, 2009 2:42 pm Post subject: Reaming wing attach holes

I use a unibit, when I am drilling bigger hole.



Rene' Felker

RV-10 N423CF Flying

801-721-6080

--

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

Cle

Joined: 19 Oct 2009
Posts: 5

Posted: Thu Oct 29, 2009 3:09 pm Post subject: Re: Reaming wing attach holes

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Thu Oct 29, 2009 9:47 pm Post subject: Re: Reaming wing attach holes

Don't know if I did it right, but it worked and the holes are round, correct size and perpendicular to the surface. Take a look here:



http://mykitlog.com/users/display_log.php?user=rlendon&project=113&category=1683&log=24457&row=315

- The Matronics Zenith601-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith601-List

_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

Display posts from previous:

	Matronics Email Lists Forum Index -> Zenith601-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum