Question about Duo Fast Duofast Cn350 Cn350b Sh Nailer O Ring Rebuild Kit

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I have a duo fast CN 350 nailer and it works ok but it don't seem to let the driver blade to come up high enough to get on nail head

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You will need to pull the top off to get to it to check it out, If the drive pin is bolted on, make sure the bolt didn't loosen up, most are one piece, welded on, If you don't find anything in there preventing it from coming up, I would grind off the tip, nice and square and flat, then put it back together. I have a feeling you will find a piece of white plastic holding the piston down, part of the head there, It will need to be replaced. Check it out, hope this helps.

Posted on Dec 29, 2010

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What degree nails should be used for a duo fast Cn 350 B nail gun?


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Jul 21, 2011 | Duo Fast Duofast Cn350 Cn350b Sh Nailer O...

1 Answer

I have got a second hand Duo-Fast CN350B Nail Gun. It is new to me, and I dont have a operating manual for it. I have heard they accept multipule guage nails, is this true? Also can the nail driving depth...


They use 20 degree, full round head, plastic coalated nails. You can shoot nails ranging in guage from .099 to .131 and I believe from 2 3/8" to 3 1/4" length. It is a heavy but well built and powerful tool. It's not made anymore because Duo-Fast has long been sold to ITW which also owns Paslode. The owner of Duo-Fast (third generation, family owned) got very ill with cancer and ended up passing away quite a few years back. I worked as a sales rep for Duo-Fast in the early 1990s. I can not find an owners manual link for you. They don't have an adjustable depth but they do have a flush adapter. Here is a link to a parts diagram. The flush adapter is part number CN-133 and is held on with a screw.

http://www.toolpartsdirect.com/cgi-bin/schematic.cgi/duofast/CN-350B

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Nail gun will not fire the nail. Compressor works fine. Hammer doesn't retract enough to hit nail? Cause, solution?


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I have a duo-fast n350 ant it sets the nail to deep . any adjustment


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I have a duo fast cn350b that misfires, the piston seems not to retract back into the chamber


I have the CN350 - not sure how it and the 350B differ.
There are several possibilities that I've experienced.
Nails other than Duofast. Causes a jam that does not allow the driver to return.
Not enough oil.
Not enough air.
Worn O rings.

Sep 09, 2010 | Duo Fast Duofast Cn350 Cn350b Sh Nailer O...

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