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Pneumatic Blind Riveter Questions

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sky_ranger161(at)yahoo.co
Guest

Posted: Tue May 02, 2006 2:49 pm Post subject: Pneumatic Blind Riveter Questions

Hi guys,

   

  Just got my new el-cheapo $24 Harbor Freight pneumatic riveter and wanted to ask a question or two about its operation since I've never really seen one in action.

   

  a. When I pull test rivets they set normally, but the mandrel doesn't seem like it's being pulled straight back. Pulled rivets appear to be bent slightly over to the left side. My hand-pulled rivets always seem to be pulled back squarely onto themselves. Is this: (a.) a loose or slipping jaw in the riveter, and (b.) ok if the rivet appears to be pulled slightly off-center?

   

  b. Is the mandrel supposed to be deposited in the plastic cup at the rear of the tool? Mine are staying in the nosepiece until I remove them by hand. I was thinking that this may be a symptom of a mis-adjusted jaw as well.

   

  Thanks for dealing with such mundane questions, but there are serious consequences if the rivets aren't being pulled correctly, so I thought I'd ask.

   

  Debo Cox

  105 hours in. 

  XL w/ Corvair

   

  Do not archive 

"A camel is a racehorse designed by a committee."

		

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rjscep(at)yahoo.com
Guest

Posted: Tue May 02, 2006 3:26 pm Post subject: Pneumatic Blind Riveter Questions

 	  Quote: 	
		   Debo, I have used a similar tool on our Glastar 

 project. The mandrel is supposed to drop out of the

 nose after the rivet is set. You might try opening

 it and examining the jaws. Anyway good luck, see if

 you get some answers from other users. Bob S. 


	


--- Debo Cox <sky_ranger161(at)yahoo.com> wrote:



 	  Quote: 	
		   

 <sky_ranger161(at)yahoo.com>

 

 Hi guys,

    

   Just got my new el-cheapo $24 Harbor Freight

 pneumatic riveter and wanted to ask a question or

 two about its operation since I've never really seen

 one in action.

    

   a. When I pull test rivets they set normally, but

 the mandrel doesn't seem like it's being pulled

 straight back. Pulled rivets appear to be bent

 slightly over to the left side. My hand-pulled

 rivets always seem to be pulled back squarely onto

 themselves. Is this: (a.) a loose or slipping jaw in

 the riveter, and (b.) ok if the rivet appears to be

 pulled slightly off-center?

    

   b. Is the mandrel supposed to be deposited in the

 plastic cup at the rear of the tool? Mine are

 staying in the nosepiece until I remove them by

 hand. I was thinking that this may be a symptom of a

 mis-adjusted jaw as well.

    

   Thanks for dealing with such mundane questions,

 but there are serious consequences if the rivets

 aren't being pulled correctly, so I thought I'd ask.

    

   Debo Cox

   105 hours in. 

   XL w/ Corvair

    

   Do not archive 

 

 

 "A camel is a racehorse designed by a committee."

 		

 ---------------------------------

 Yahoo! Messenger with Voice. PC-to-Phone calls for

 ridiculously low rates.

 

 

 



 browse

 Subscriptions page,

 FAQ,

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

 Admin.



 

 

 

  

  

  

 

 

 

 


	




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p.mulwitz(at)worldnet.att
Guest

Posted: Tue May 02, 2006 4:43 pm Post subject: Pneumatic Blind Riveter Questions

Hi Debo,



Yes the stems normally are left in the front of the nose piece and 

fall out if you tip the gun down.  Sometimes they get jammed and you 

wind up smacking them a little and they wind up in the little plastic 

cup in the back.  I think the cup is just to keep from sending the 

odd stem flying back at the user.



I too had plenty of problems with rivets not set completely straight 

with the work piece.  I think this is a natural problem with the 

shape of the rivet heads we use and the very narrow nose piece front 

end.  I solved it for most uses by making nose pieces with wide front 

ends.  That makes it easier to see when the nose piece is aligned 

with the surface of the work piece.  This can't be used in all cases 

- it seems to make the rivets even more crooked when they are set at 

a really bad angle.  For those cases you can use the narrow nose 

piece or a special one with the front end ground at an angle.



I think this is a bigger problem with the pneumatic riveter than the 

hand riveter because of the speed the rivet is pulled.  With the hand 

riveter the process is so slow you can realign the rivet as you are 

pulling it to make it straighter.  That is not an option when it is 

all pulled quickly by the air.  It is much more critical that your 

rivet stem is at a right angle to the work piece when you pull the trigger.



One last little bit - When I made the first few new nose pieces on my 

lathe I didn't get the back end the right length.  This caused 

strange effects including requiring two pulls of the trigger to get 

the rivet stem to break and rivets getting jammed in the riveter.  I 

found that if I made the ratio of the back portion of the nose piece 

to the diameter of the rivet stem the same as all the nose pieces 

included with the riveter all the problems go away.  I know this 

sounds complicated but is really simple in practice.  Anyone who gets 

in this little mess is welcome to write to me for a little help.



Good luck,



Paul

XL wings

At 03:48 PM 5/2/2006, you wrote:

 	  Quote: 	
		  Just got my new el-cheapo $24 Harbor Freight pneumatic riveter and 

wanted to ask a question or two about its operation since I've never 

really seen one in action.



   a. When I pull test rivets they set normally, but the mandrel 

 doesn't seem like it's being pulled straight back. Pulled rivets 

 appear to be bent slightly over to the left side. My hand-pulled 

 rivets always seem to be pulled back squarely onto themselves. Is 

 this: (a.) a loose or slipping jaw in the riveter, and (b.) ok if 

 the rivet appears to be pulled slightly off-center?



   b. Is the mandrel supposed to be deposited in the plastic cup at 

 the rear of the tool? Mine are staying in the nosepiece until I 

 remove them by hand. I was thinking that this may be a symptom of a 

 mis-adjusted jaw as well.



   Thanks for dealing with such mundane questions, but there are 

 serious consequences if the rivets aren't being pulled correctly, 

 so I thought I'd ask.



   Debo Cox

   105 hours in.

   XL w/ Corvair


	


---------------------------------------------

Paul Mulwitz

32013 NE Dial Road

Camas, WA 98607

---------------------------------------------

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dbortol(at)yahoo.ca
Guest

Posted: Wed May 03, 2006 8:48 am Post subject: Pneumatic Blind Riveter Questions

>  Just got my new el-cheapo $24 Harbor Freight pneumatic riveter and wanted to

 > ask a question or two about its operation since I've never really seen one in

 > action.

  

 <snip>

    

  > b. Is the mandrel supposed to be deposited in the plastic cup at the rear of

 > the tool? Mine are staying in the nosepiece until I remove them by hand. I was

 > thinking that this may be a symptom of a mis-adjusted jaw as well.

    

 I have the same riveter and I have seen the same thing as you with the stems getting stuck in the nosepiece. I disassembled mine to see if I could figure out the problem. The back portion of the nosepiece presses down on the jaws that grip the rivet stem, and the more it is pressed, the wider it opens. If you look at the original nosepieces, you'll see that the bigger the stem, the longer the back part of the nosepiece is. There is a fine line between pressing the jaws down too much and the rivet will fall out of the rivet gun, and not pressing them enough and the stem won't fall out after you pull the rivet. I found that loosening or tightening the nosepiece very slightly can get me to the right point between these two. In your case, see if you can tighten the nosepiece a bit more to let the stem fall out on its own.

 

 Dino

 XL/Corvair

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