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fundamental question

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zenith-list(at)steensland
Guest

Posted: Fri Sep 11, 2009 2:43 pm Post subject: fundamental question

Guys,



I have been building for a little while now and I have something that 

has been nagging me for a while now.



I noticed that the recommended pressure zenith suggests for pulling A5 

and A4 rivets seems a little low to my riveter.  If I set it to those 

values, it won't break the stem off.



So I turn up the pressure a little until I can get it to break. So I 

guess my question is, how long from the time you squeeze the trigger 

until the stem breaks are people experiencing.



I can wait 20 seconds down to almost instantly. When they break off 

instantly I get oddly shaped ends, so obviously that isn't correct.



What say you, netizens?

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NYTerminat(at)aol.com
Guest

Posted: Fri Sep 11, 2009 2:58 pm Post subject: fundamental question

LEE,

  

 I used as much air as required to smoothly pull and break off the  stem.  If you use too much air, the rivet gun will jerk and bounce back  onto the skin and leave marks.

  

 Bob Spudis

 N701ZX / 912S

  

  

  

 In a message dated 9/11/2009 6:43:47 P.M. Eastern Daylight Time,  zenith-list(at)steensland.net writes:

  	  Quote: 	
		  -->    Zenith601-List message posted by: Lee Steensland    <zenith-list(at)steensland.net>



Guys,



I have been building    for a little while now and I have something that 

has been nagging me for a    while now.



I noticed that the recommended pressure zenith suggests for    pulling A5 

and A4 rivets seems a little low to my riveter.  If I set    it to those 

values, it won't break the stem off.



So I turn up the    pressure a little until I can get it to break. So I 

guess my question is,    how long from the time you squeeze the trigger 

until the stem breaks are    people experiencing.



I can wait 20 seconds down to almost instantly.    When they break off 

instantly I get oddly shaped ends, so obviously that    isn't correct.



What say you,  ========================;   Use the  ties  Day  ================================================               - MATRONICS WEB FORUMS  ================================================             - List Contribution Web Site  sp;                             ===================================================



	


 

  

  [quote][b]

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Fri Sep 11, 2009 3:12 pm Post subject: fundamental question

If you set the pressure at the tank and have a long length of hose or  

a small diameter hose, the pressure may drop quite a bit at the gun.  

It shouldn't take much more than a second or so to set a rivet. I  

would suggest you adjust the pressure to get a clean break in about a  

second



On Sep 11, 2009, at 6:28 PM, Lee Steensland wrote:



 	  Quote: 	
		   

 >



 Guys,



 I have been building for a little while now and I have something  

 that has been nagging me for a while now.



 I noticed that the recommended pressure zenith suggests for pulling  

 A5 and A4 rivets seems a little low to my riveter.  If I set it to  

 those values, it won't break the stem off.



 So I turn up the pressure a little until I can get it to break. So I  

 guess my question is, how long from the time you squeeze the trigger  

 until the stem breaks are people experiencing.



 I can wait 20 seconds down to almost instantly. When they break off  

 instantly I get oddly shaped ends, so obviously that isn't correct.



 What say you, netizens?


	


-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

z601a(at)anemicaardvark.c
Guest

Posted: Fri Sep 11, 2009 4:43 pm Post subject: fundamental question

I can't say I had the exact same problem, but I had the same symptoms. In my 

case, I needed to service the fluid level in the gun. That raised the 

pressure, and the stems poppe right off.



On Friday 11 September 2009 17:28, Lee Steensland wrote:

 	  Quote: 	
		   

 <zenith-list(at)steensland.net>



 Guys,



 I have been building for a little while now and I have something that

 has been nagging me for a while now.



 I noticed that the recommended pressure zenith suggests for pulling A5

 and A4 rivets seems a little low to my riveter.  If I set it to those

 values, it won't break the stem off.



 So I turn up the pressure a little until I can get it to break. So I

 guess my question is, how long from the time you squeeze the trigger

 until the stem breaks are people experiencing.



 I can wait 20 seconds down to almost instantly. When they break off

 instantly I get oddly shaped ends, so obviously that isn't correct.



 What say you, netizens?


	


-- 

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

                Do not archive.

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

                Jim B Belcher

    BS, MS Physics, Math, Computer Science

                  A&P/IA

     Retired aerospace technical manager

       Happiness is a belt-fed weapon

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

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Ron Lendon

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

Posted: Fri Sep 11, 2009 5:04 pm Post subject: Re: fundamental question

I set my pressure so I have time to hold the rivet to the surface, pull it tight, reverse my hold (so I'm pulling away) when it breaks the stem.



Never timed it, but maybe 3 seconds.



When I pull away as it pops the stem, it leaves no marks and doesn't bounce.

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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:
https://sites.google.com/site/corvairenginedata/

naumuk(at)windstream.net
Guest

Posted: Fri Sep 11, 2009 5:35 pm Post subject: fundamental question

I second this recommendation.

                                                                    Bill

---

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careywf(at)sbcglobal.net
Guest

Posted: Sat Sep 12, 2009 5:35 am Post subject: fundamental question

I third this recommendation. Try to prevent the air gun from bouncing and leaving a mark or dent. I hold the gun in my right hand and use my left hand to hold the pulling head of the gun on the rivet head and dampen the unavoidable bounce of the gun when you pull the trigger. You'll get the idea after a few pulled rivets. I average about a second per pull. You're going to have somewhat of a ragged edge where the stem breaks off because you're basically pulling apart the steel stem at the weakest point just below the rivet head.

  

 Walt Carey in Dayton

 601XL w/Jab 3300A.

  

 

--- On Fri, 9/11/09, Bill Naumuk <naumuk(at)windstream.net> wrote:



 [quote]

From: Bill Naumuk <naumuk(at)windstream.net>

Subject: Re: fundamental question

To: zenith601-list(at)matronics.com

Date: Friday, September 11, 2009, 9:29 PM



 --> Zenith601-List message posted by: "Bill Naumuk" <naumuk(at)windstream.net (naumuk(at)windstream.net)>



I second this recommendation.

                                                                   Bill

---

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naumuk(at)windstream.net
Guest

Posted: Sat Sep 12, 2009 7:15 am Post subject: fundamental question

Oddly, I tried trimming this post and it won't  allow me to. Oh, well. 

     I started my project with a  Zenith hand puller and the "Jump" was so bad I had to hold a cardboard mask  around the rivet to protect the surface underneath. When the riveter wore out I  went to an HF air gun and was really worried about the jump, but there was none  to speak of. Perfectly set rivets 99% of the time- I might have to drill and  reset 1 out of a hundred. I don't know if that's due to the construction of the  HF riveter or my overall setup. I have a 20gal 5hp compressor, good quality 50'  hose, and run 90psi at the secondary regulator.

     That's not to say the HF puller  is perfect- they have two bad habits. One is a leak that develops in the trigger  mechanism that reverses the action, spitting out oil rather than pulling  the rivet. The HF comes with a full set of replacement gaskets and nose jaws,  but I've never figured out how to fix the problem. If anyone knows how, I have  one that has this malady and would appreciate hearing from you.

     The second is related to grip-  either the puller doesn't grab the rivet or won't let go of it. The HF comes  with a wrench that has a template for nosepiece adjustment, but I found that is  just a starting point. You might have to adjust 1/16" from the template mark  either way depending on how the puller is acting. DON'T THROW TOMATOS IF I'M  WRONG, but I think you rotate the nosepiece assembly counterclockwise if the  puller won't let go of the rivet. Actually, you CAN throw tomatos as long as you  also throw the lettuce and a bottle of blue cheese dressing to make a  salad.

                                                                                               Bill

 [quote]   ---

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