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RRH Rivet gun weirdness, this normal?

Bitter

Active member
Joined
Feb 4, 2018
Messages
30
Boss has an Atlas Copco RRH (forgot which, 10 I think) air rivet gun and it's a little weird. You have to really lean into it to get it to go when you pull the trigger. I always see these guns spoken of like God's gift to pneumatic hitters so I don't know if this is normal or not, this makes it really tough to use where you can't bear down some weight into it. Anyone know if this is normal and anyone know how to disable this 'feature'?
 
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Skin

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Feb 24, 2010
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It's by design. They have two types of each riveter. A normal trigger start model that functions as you'd expect and a push start model where the trigger won't function until the barrel has some tension against it. I suspect the latter is some sort of safety model so if the bit slips it doesn't damage the surrounding surface. If you go shopping for your own make sure there is a TS on the model tag which denotes that it's a trigger start. You could probably change it to a trigger start with a component or two but given their retail cost (meaning high component costs) and strict distribution network it would probably be easier to just sell it and buy a TS.
 
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B

Bitter

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Feb 4, 2018
Messages
30
I found the old listing from my eBay history, it was a RRH10P but all I can pull up anymore is the title of the listing. I'll have to check the tag at work on Tuesday. I was pretty sure it was a TS but maybe the seller had it mislisted. It's been bought so long ago it's too late now. I'll have to find a parts break down and see if there's something I can just take out like maybe a spring or swap in a weaker spring so it takes less pressure. It takes a solid 20lbs of force or more which can be hard to get at certain angles and situations.

Looks like maybe it's 28 or 29 is the spring to push against. Might take it apart and see if that's the spring and maybe I'll get lucky and the local Ace will have a similar size but weaker spring that'll do. Seems like it's designed to block airflow from the trigger into the barrel until it's pushed in.
 
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