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Old 06-18-2019, 09:24 AM   #21
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You were able to drive the 1/4" stainless rivets with a HF 1/4" pneumatic riveter? I'm having problems with mine - it's able to set the 1/4" aluminum rivets no problem, but using my pancake compressor (120 PSI 2.3 SCFM) it's not able to run the steel ones. The mandrel only moves a tiny distance before breaking off, allowing the rivet to then slip out of its hole.

I've also tried it with a Dewalt compressor I just bought that delivers 5 SCFM, and it works slightly better. It pulls the mandrel slightly farther so at least there's enough deformation to hold the rivet in place. But it's still not working correctly as the base of the mandrel is still a good quarter inch from the back of the material instead of being flush with it as with the aluminum rivets.

This riveting stuff is very depressing. It seems like choosing 1/4 instead of 3/16 was a big mistake. It's not too late to change, but I'm curious how you got it working with HF gear.
Try 1/4" solid steel rivets if you want depressing. A 4x aircraft rivet gun has problems with those. I can do 3/16" all day long but the 1/4" ... not so much. They are deforming but not near as much as I would like. I really don't want to crank the air to 120psi but 90-100 isn't doing it. I also don't want to have to buy a 6x gun. I should check the rental places.

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Old 06-18-2019, 09:24 AM   #22
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Could be your rivets?
Some are meant to break off lower, some flush.
Mine is still working.
I'm using closed-end 1/4" stainless steel blind rivets from here: https://www.rivetsonline.com/blind-r...iAAEgIhLPD_BwE

There's a diagram on that page that shows what a properly-set rivet is supposed to look like, but mine don't really look like that (mine look barely distorted at all instead of squashed like that).

I'm trying to gas up my ipod here so I can post a picture of them.
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Old 06-18-2019, 09:26 AM   #23
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I am running a 3hp/40gallon compressor.
At what pressure? If he has a true 5 CFM compressor, he should have plenty of pressure as well to work with.
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Old 06-18-2019, 09:27 AM   #24
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Try 1/4" solid steel rivets if you want depressing. A 4x aircraft rivet gun has problems with those. I can do 3/16" all day long but the 1/4" ... not so much. They are deforming but not near as much as I would like. I really don't want to crank the air to 120psi but 90-100 isn't doing it. I also don't want to have to buy a 6x gun. I should check the rental places.
Solid steel is even worse than stainless for rivets?

I'm thinking I should just switch to 3/16" and avoid all this. What do you suppose the consequences would be of running the HF gun at 120 PSI instead of 90?
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Old 06-18-2019, 09:29 AM   #25
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At what pressure? If he has a true 5 CFM compressor, he should have plenty of pressure as well to work with.
I don't think it's "true" 5 CFM - it's labeled as 5 SCFM (the "S" stands for screw you apparently). For consumer-grade compressors they apparently measure input airflow for that which is less than output. But it's definitely pulling better than my 2.3 pancake (which deformed the rivets only a tiny amount and I could still pull them out by hand afterwards).
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Old 06-18-2019, 09:37 AM   #26
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Here's a pic of some of my test rivets from the back side: https://imgur.com/a/uZ4aZU1

The aluminum ones seem to be deforming properly, but the stainless ones are barely distorted at all (these are the ones driven by the 5 SCFM compressor, the ones driven with the 2.3 are even less flattened).
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Old 06-18-2019, 09:42 AM   #27
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Solid steel is even worse than stainless for rivets?
Solid is absolutely harder than pop rivets.

Quote:
What do you suppose the consequences would be of running the HF gun at 120 PSI instead of 90?
You'll be buying a new HF rivet gun. But for $20 it might be the route to go. Who knows maybe it'll hold together long enough to finish.
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Old 06-18-2019, 09:56 AM   #28
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I don't think it's "true" 5 CFM - it's labeled as 5 SCFM (the "S" stands for screw you apparently). For consumer-grade compressors they apparently measure input airflow for that which is less than output. But it's definitely pulling better than my 2.3 pancake (which deformed the rivets only a tiny amount and I could still pull them out by hand afterwards).
They also have a number for instant vs constant. Don't remember the terminology. Whatever it is, it's just fancy talk for bull$hit.

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Here's a pic of some of my test rivets from the back side: https://imgur.com/a/uZ4aZU1
FUGLY!!!
Top to bottom, left side,...2 and 4 are ugly as hell but aren't going anywhere.


Quote:
The aluminum ones seem to be deforming properly, but the stainless ones are barely distorted at all (these are the ones driven by the 5 SCFM compressor, the ones driven with the 2.3 are even less flattened).
3/16" solid steel with 4x gun running at 90psi. I should do another photo shoot of the 1/4" rivets.


Attached Images
File Type: jpg 4x rivet1.jpg (136.1 KB, 176 views)
File Type: jpg 4x rivet2.jpg (126.7 KB, 172 views)
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Old 06-18-2019, 10:04 AM   #29
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FUGLY!!!
Top to bottom, left side,...2 and 4 are ugly as hell but aren't going anywhere.
2 and 4 are the aluminum rivets. The others are stainless closed-end blind rivets, and those are my problem. FWIW they also don't seem to be going anywhere, even though they are much less squashed.

On the plus side, I just ran some again using my 2.3 SCFM pancake compressor and they're basically going in the same as with the 5.0 compressor, so I guess the compressor isn't the problem here (and I can take this $379 thing back to Lowes - even though I'm in love with it now, so cool).
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Old 06-18-2019, 10:05 AM   #30
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I'm thinking I should just switch to 3/16" and avoid all this.
I know it's just a test piece and all but I'm thinking your rivets are too long as well.

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Old 06-18-2019, 10:10 AM   #31
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Oops, misread.
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Old 06-18-2019, 10:12 AM   #32
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I know it's just a test piece and all but I'm thinking your rivets are too long as well.

Yeah, the grip range on these is .126-.250 and the test piece is just 18 ga or so.
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Old 06-18-2019, 10:15 AM   #33
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At what pressure? If he has a true 5 CFM compressor, he should have plenty of pressure as well to work with.
I am running 100 psi
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Old 06-18-2019, 10:17 AM   #34
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18ga is like .05 so try riveting two together. Also make sure to deburr the holes.
What size drill bit are you using?
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Old 06-18-2019, 10:28 AM   #35
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18ga is like .05 so try riveting two together. Also make sure to deburr the holes.
What size drill bit are you using?
I tried three sheets together but it looks pretty much the same on the backside. I normally deburr but I'm being lazy on these test holes.

I ordered some "F" bits which are .257" cutting diameter and supposedly meant for 1/4" rivets (I'd never heard of these before stumbling on them the other day). These create perfect holes for my rivets in backed 1/8" stock but in thin metal like my test piece the bit walks (or whatever it's called) and creates a slightly triangular hole that the 1/4" rivets don't fit in. So I'm using a 17/64" bit for these test pieces.

I think I'm going to sacrifice one of my plates and test these steel rivets out on the actual material I'm going to use.
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Old 06-18-2019, 10:28 AM   #36
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(and I can take this $379 thing back to Lowes - even though I'm in love with it now, so cool).
[rant]For $379 I want to be able to rivet plate on a battleship from 100 yards!!! I've been thinking of getting a new compressor myself. I just can't justify the costs these days. If I had a shop, I'd want one of the 220volt 80 gallon 12-15cfm type jobs. That would be worth $379. Something you carry around with you isn't even close. [/end rant]
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Old 06-18-2019, 10:31 AM   #37
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[rant]For $379 I want to be able to rivet plate on a battleship from 100 yards!!! I've been thinking of getting a new compressor myself. I just can't justify the costs these days. If I had a shop, I'd want one of the 220volt 80 gallon 12-15cfm type jobs. That would be worth $379. Something you carry around with you isn't even close. [/end rant]
This thing (a Dewalt) is a perfect match with the cargo suit Sigourney Weaver fought the queen with in Aliens. How can I take this back???
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Old 06-18-2019, 10:31 AM   #38
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I think I'm going to sacrifice one of my plates and test these steel rivets out on the actual material I'm going to use.
Drive your butt down here...
1) I've got plenty of scrap you could practice with...
2) I can put you to work bucking rivets...
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Old 06-18-2019, 10:34 AM   #39
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Drive your butt down here...
1) I've got plenty of scrap you could practice with...
2) I can put you to work bucking rivets...
**** man, I'm an hour and twenty minutes away. I drove five hours to help inhof009 raise his roof, I'd be happy to come rivet.
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Old 06-18-2019, 11:04 AM   #40
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to run some air tools like grinders etc, you need a 7.5 HP, 40 amp motor, an 80 gal tank, with a 2 stage compressor providing 24 cfm @ 90 lbs- that will set you back about $2500 +/- - or rent one
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