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  #1  
Old 11-04-2017, 08:32 AM
Larry DeCamp's Avatar
Larry DeCamp Larry DeCamp is offline
 
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 539
Default Flush rivet appearance quality?

I purchased a project with ALL skin rivets that LOOK like they were back riveted. I cannot reproduce these results. My ATS gun with high pressure and throttle valve closed as much as it will, still runs fast NOT THUMP THUMP. The rivet head looks shiny ( too much hitting? ). The project I purchased, the factory head looks like it came out of the bag and the little dent looks like never struck, and transition to skin is beautiful. What am I doing wrong ? What rivet gun will do better ?
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  #2  
Old 11-04-2017, 08:49 AM
wilddog wilddog is offline
 
Join Date: Feb 2008
Location: va.
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Larry,
What psi are you running and is your gun 2X or 3x?
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  #3  
Old 11-04-2017, 09:30 AM
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Larry DeCamp Larry DeCamp is offline
 
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 539
Default Gun is old ATS

I dont know what model ( 2x,3x, ?? ) I turned pressure up high, 80 lb+ thinking it would deform the rivet without "pecking" at a high frequency, but the the throttle valve is closed and it still hammers fast and I think is hardening the rivet in the process.
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  #4  
Old 11-04-2017, 09:45 AM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,729
Default Rivet gun

The gun should have markings. Post them. One of us should be able to decipher them.
Try a good mini regulator set at about 25 psi for #3 rivets. The little HF regulator is ok.
A good shop head on my Sioux takes about 2 second pulse. Also, try a strip of heavy packing tape over the factory head.
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Donated 12/01/2017. Plus a little extra.
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  #5  
Old 11-04-2017, 11:09 AM
wilddog wilddog is offline
 
Join Date: Feb 2008
Location: va.
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Larry,
I use 22-25 psi with a 3x gun. I have a 2X but find it hits lighter and faster and requires more hits than the 3x does. The little knob thing on the handle just controls air flow, not pressure, so set your regulator. That is with 426-3 rivets, 470 takes a little more psi. If you are back riveting, it will take more pressure usually about 45 psi , I think, but that will vary with the back rivet thing, longer ones need more pressure. When you do 470 rivets try the little plastic things that go on the set, they help a lot.
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  #6  
Old 11-04-2017, 11:12 AM
BillL BillL is offline
 
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Location: Central IL
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Always use tape, that prevents the shiny look of the set rivet.
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  #7  
Old 11-04-2017, 01:02 PM
Kyle Boatright Kyle Boatright is online now
 
Join Date: Aug 2005
Location: Atlanta, GA
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35-40 PSI is what I use on 3/32 rivets. About 60 PSI on 1/8" rivets. 80 is waay too much.
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2001 RV-6 N46KB
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  #8  
Old 11-04-2017, 01:12 PM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
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Question

Quote:
Originally Posted by Kyle Boatright View Post
35-40 PSI is what I use on 3/32 rivets. About 60 PSI on 1/8" rivets. 80 is waay too much.
Larry said in the OP that he has the throttle valve closed. Perhaps a test with the throttle valve fully open and less psi might be in order?

If it's a slow thump-thump I'm also wondering if the rivet gun is really an air hammer...
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Half completed RV-10 QB purchased
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  #9  
Old 11-04-2017, 02:22 PM
Kyle Boatright Kyle Boatright is online now
 
Join Date: Aug 2005
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Quote:
Originally Posted by az_gila View Post
Larry said in the OP that he has the throttle valve closed. Perhaps a test with the throttle valve fully open and less psi might be in order?

If it's a slow thump-thump I'm also wondering if the rivet gun is really an air hammer...
I saw that, but I'm not familiar with a throttle valve.
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  #10  
Old 11-04-2017, 03:47 PM
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az_gila az_gila is offline
 
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Location: 57AZ - NW Tucson area
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Quote:
Originally Posted by Kyle Boatright View Post
I saw that, but I'm not familiar with a throttle valve.
Sometimes incorrectly called a "regulator" and sold by cheap places such as HF -

https://www.harborfreight.com/air-to...tor-68220.html

It's simply an inline variable restrictor. There is no pressure regulation going on in it for $3.59.
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EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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