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4X rivet gun as air hammer suggestions

klrcommute

New member
Joined
May 21, 2018
Messages
2
Location
PA
Decided to pick up a 4X pneumatic rivet gun to use as an air hammer--4X because of the more common .401 bore size for attachments.

Any good suggestions? Seems like such a niche thing that there's not many reviews out there besides some talk on aviation forums and the like. I've been hunting around ebay, and there's a few dozen 4X guns, but nothing really sticking out as an awesome deal so I've been debating if I should buy a Chicago Pneumatic (CP) rebuilt for ~$160 or get a new CP clone like the one made by Aircraft Tool Supply (ATS) for ~$185. The Yardstore also has one made by Air Capital Air Tools for ~$175. Think there's any advantage to buying the rebuilt CP since it's unknown whether OEM parts went into it anyway? Or just go with a new clone where none of the tolerances are potentially worn?

Also, anyone know of a good quick change adapter to fit the CP style guns? Yardstore has a couple, one says it fits 'X' style guns and the other says for particular brands. Do they just thread onto the end where the beehive spring would be and stay put with set screws?

Regulators? ATS has a small swivel one that someone on here recommended. These things actually change how hard the gun hits or just decrease the flowrate, leaving you with fewer blows per minute?

Accessories, sets, drifts, etc. I saw that Old Forge and Mayhew seem to have a bunch for reasonable prices, any other suggestions? Like I said, this will be going to work as an air hammer, mostly driving out stuck pivot pins, bearing races, and the like. But I like what people have said about these rivet guns having better control, hitting harder, and probably being a better overall value than your average mid-price air hammer--I just don't have any experience with 'em, so any input is appreciated.

Thanks, all!
 
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2ndGearRubber

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Joined
Mar 24, 2014
Messages
14,185
Location
Pittsburgh
I run a CP714, and the Astro .498 hammer. Ajax from Epstein is my preferred bit brand. Specialty bent adapters and bushing punches are auto tool manufactrer only, but for standard chisels/punches etc, I don't think you can beat Ajax for the money, really good stuff.

If you're just getting into the high quality/controllable air hammers, pick up some pencil point chisels too. It's so nice being about to taaapppa-taaapppa-taaapppa on something to jar a delicate part loose. Hell, I used my 714 to take off a BMW rear axle nut yesterday. I would guess it was a 12 point something at one time. It was so rotted I couldn't even guess what size it started at, it looked like a cone. Light taps get a dent started, then power it around. :)
 
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langss

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Joined
Jan 31, 2009
Messages
322
Location
California
3X is more the norm/standard for use in aviation, but your not going to be using it to shoot 3/32 rivets. I never had any problem finding sets in .401, and unless again your going to shoot rivets, the beehive spring is a pain to remove everytime you want to change sets. The bottom one of the three pictured is probably what your going to want, its what I always used. https://www.usatco.com/item/RIVET+GUN+RETAINER/Rivet-Gun-Retainer-Springs/
 

Mohawk Dave

Well-known member
Joined
Oct 7, 2012
Messages
5,068
Location
SoCal
I have a drawer full of 2x, 3x, 4x guns, .401 and .498...any old brand is good. I'm still trying to decide which ones to keep based on trigger feel etc.

Also, I use the aluminum screw on retainers. Mine just happen to be rebranded Blue-Point b/c that what I found at YS, CL, Swaps etc. No set screw, just screw on/off
 
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