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Old 06-05-2019, 10:45 AM   #1
Mini-Skoolie
 
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River hell

Ok so Im just getting started on the wall rivets. I have the air hammer with center punch to punch out the holes.
1. Almost none of the holes are punching out
2. When I am using the forked chisels(sharpened and unsharpened) they dont come close to budging the rivets. My gun goes up to 90psi and it appears to be functioning properly.

What the hell do I do? Angle grind the 1000 rivets off? Any ideas
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Old 06-05-2019, 10:48 AM   #2
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Drill maybe?
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Old 06-05-2019, 11:00 AM   #3
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I had the same problem until I anted up for a BIG compressor capable of delivering 120 pounds of air at 10 CFM on an ongoing basis. Air chisels need a huge volume of air to really get the job done. To help with your immediate problem try grinding a "cross" into the head of the rivet using thin blade disc grinder before you go after it with the chisel.
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Old 06-05-2019, 11:20 AM   #4
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Sometimes you got to grind the center punch down. Same size as rivet hole
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Old 06-05-2019, 11:24 AM   #5
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Mistyped Title,
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Old 06-05-2019, 11:27 AM   #6
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Quote:
Originally Posted by Ninjakitty View Post
Sometimes you got to grind the center punch down. Same size as rivet hole
A center punch has a point already smaller than the mandrel on a rivet. Don't know what the OP's issue is, shouldn't be that hard to pop the mandrels out.
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Old 06-05-2019, 11:27 AM   #7
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I had to grind mine down about a half an inch to pop mine out
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Old 06-05-2019, 11:41 AM   #8
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Are you hitting the rivets with the fork chisel on the head side of the rivet? A lot of mine were aluminum (big plus) but even the steel ones I didn't need to punch the centers except on four of them. The rest, with sharp/radiused chisel, I could zip through in about 5 seconds each. Place the edge of the chisel just beneath the lip on the rivet, place a slight pressure on the air gun as if you're trying to pry up the rivet, but nowhere near enough pressure to actually do so, as you pull trigger. Should chew through the mandrel with little effort. Sometimes I had to switch directions after cutting halfway into the mandrel but most went easy, one pass.
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Old 06-05-2019, 12:15 PM   #9
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Is my compressor just too weak? My air hammer says to run at 90 psi but Im using it at 125( until it drops down 2 secs after)
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Old 06-05-2019, 12:26 PM   #10
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I used a 10gal capacity and when I bought the harbor Freight gun it said 11 gal was the minimum to run an air chisel gun. My 10 gal definitely had to work double duty. You might try a bigger compressor for sure, if one is available. They push a lot of air pretty quickly.
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