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Harbor Freight Riveter problems

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klburris

Joined: 19 Dec 2009
Posts: 18

Posted: Sat Oct 16, 2010 12:36 pm Post subject: Harbor Freight Riveter problems

Folks;

If someone understands why Zenith uses flush blind rivits and reforms them 

in the riviting process to a 'domed head' rivit, please elaborate on the 

reasons.It just seems to me (yes, it's true, I'm a noobe and haven't started 

a plane yet) that it would be much simpler to just use domed head pull 

rivits - or maybe that's a dumb assumption.

Thanks in advance.



-- Keith

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grs-pms(at)comcast.net
Guest

Posted: Sat Oct 16, 2010 12:50 pm Post subject: Harbor Freight Riveter problems

Hello, Keith:



I remember reading Chris Heintz' explanation of his use of modified Avex 

rivets, some years back.  He had a good reason for doing so.  I'm sure a 

call to the factory would get you the information.  Perhaps it's in an old 

issue of Zenith News.



George Swinford

\



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larry(at)macsmachine.com
Guest

Posted: Sat Oct 16, 2010 1:12 pm Post subject: Harbor Freight Riveter problems

Hi Keith,

The domed heads have advantage as the head is drawn from a recess head to

the domed condition.  The rivet grips aluminum better long term as the

strength is increased during the draw.  The aircraft is not 

a fast destination plane in general terms. The domed heads don't add drag to

any extent for the speeds we require, at least 150 mph or less.  The thin

materials that are used in Zenith aircraft would also look 

excessively bumpy between flush rivets. I used .020 and .025 to get around

the issue and improved surfaces in the sheet aluminum.  This is not uncommon

even in flush riveted standard aircraft either if you look closely.

Repair of pulled rivets is considerably easier.  Poorly set pulled rivets

can easily be drilled out where dimpled flush rivets as solid types present

more serious issues for repair.  Once  you get into it, you realize the 

rivets don't really subtract from the plane.  If you feel flush rivets are a

better solution, you should really consider building a RV or other type

designed for them. Do expect to spend a lot more time in the build process.

Best regards,



Larry McFarland  601HDS at www.macsmachine.com



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Z601c(at)anemicaardvark.c
Guest

Posted: Sat Oct 16, 2010 1:17 pm Post subject: Harbor Freight Riveter problems

On Saturday 16 October 2010 15:28:13 you wrote:

 	  Quote: 	
		   

 

 Folks;

 If someone understands why Zenith uses flush blind rivits and reforms them

 in the riviting process to a 'domed head' rivit, please elaborate on the

 reasons.It just seems to me (yes, it's true, I'm a noobe and haven't

 started a plane yet) that it would be much simpler to just use domed head

 pull rivits - or maybe that's a dumb assumption.

 Thanks in advance.


	


My understanding was that flush blind rivets (specifically, Avex rivets) were 

used to simplify construction. The domed head was to increase the strength, by 

pulling the body of the rivet tighter.



Mind you, I'm out of my area of expertise. That's just what I remember.



-- 

========================================

                                       Jim B. Belcher

                              BS,MS Physics, Math, Computer Science

                                            A&P/IA

                             General Radio Telephone Certificate

                                   Instrument Rated Pilot

                           Retired Aerospace Technical Manager

                        

========================================

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paulrod36(at)msn.com
Guest

Posted: Sat Oct 16, 2010 3:12 pm Post subject: Harbor Freight Riveter problems

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  yes, there really is a reason.  It was written somewhere in Zenith's  pages, can't remember where.  They recommend using countersunk rivets and  the domed puller head so that, as the head is rounded, it work-hardens the rivet  head. Makes it tougher.

  

 Paul R

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flyadive(at)gmail.com
Guest

Posted: Sat Oct 16, 2010 3:24 pm Post subject: Harbor Freight Riveter problems

Good Question Keith;



But WHY domed rivets at all!  Dimple the skin and rib and use FLAT HEAD.

That is what I would like to do --- I will be making the cal or sending an email to find out WHY NOT!

 



Barry

On Sat, Oct 16, 2010 at 4:28 PM,  <klburris(at)frontiernet.net (klburris(at)frontiernet.net)> wrote:

  	  Quote: 	
		  --> Zenith-List message posted by: <klburris(at)frontiernet.net (klburris(at)frontiernet.net)>

  

 Folks;

 If someone understands why Zenith uses flush blind rivits and reforms them in the riviting process to a 'domed head' rivit, please elaborate on the reasons.It just seems to me (yes, it's true, I'm a noobe and haven't started a plane yet) that it would be much simpler to just use domed head pull rivits - or maybe that's a dumb assumption.

  Thanks in advance.

 

 -- Keith 

 

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-- 

Barry

 "Chop'd Liver"



 

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jeffrey_davidson(at)earth
Guest

Posted: Sat Oct 16, 2010 4:22 pm Post subject: Harbor Freight Riveter problems

At least part of it is that when the head is reshaped as it is pulled with

the modified rivet head, the metal is work hardened and becomes stronger.

Jeff Davidson

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klburris

Joined: 19 Dec 2009
Posts: 18

Posted: Sun Oct 17, 2010 9:38 am Post subject: Harbor Freight Riveter problems

Hey guys;

Thanks for all the replies. The knowledge here is great.



-- Keith

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