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How to remove a chuck on a DCD 796


gandalfnz

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Hi all

 

I have recently purchased a dewalt DCD 796.

Great Drill but has some chuck wobble.

 

I was wondering how to remove a chuck from this drill, in order to install a new better one.

 

Thing is, the screw inside the chuck does not look standard to  me, I mean its not hex...see photo attached.

 

Does anyone know how to have the chuck removed?

 

Thanks for your help!

 

 

IMG_2680.JPG

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Hi all
 
I have recently purchased a dewalt DCD 796.
Great Drill but has some chuck wobble.
 
I was wondering how to remove a chuck from this drill, in order to install a new better one.
 
Thing is, the screw inside the chuck does not look standard to  me, I mean its not hex...see photo attached.
 
Does anyone know how to have the chuck removed?
 
Thanks for your help!
 
 
IMG_2680.thumb.JPG.5dca61daf90ed6e37a17d2fc6d3b8baa.JPG
Torque lol warped a 7/8 auger in triple stack of treated 6x6, and mine spun out after 10 minutes of trying to reverse it against a pry. Been meaning to loctite the thing, but seems I don't have the hand strength to undo it right now lol anyways, I was pissed thinking I snapped or sheared the bolt, but it was clean as hell, unbroken, and when compared to the view inside my 791, they're identical. If you're looking to remove it intentionally though, my best advice would probably be some heat just in case. [emoji108]

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It is threaded, that dimpled end is the bottom of a threaded bolt that begins back in the gear house. Chuck spins off once you break it free, but I saw zero evidence of that breaking or damaging any kind of retaining mechanism. So my advice is that enough reverse torque I've unthreaded mine without damage, but I would take regular nut busting precautions if I were deliberately trying to remove another one for the first time. Ie, heat the threads, maybe mix up some acetone/dex II 50/50 homemade penetrating oil, whatever you might do to break a nut free without damaging the materials lol your new drill in this case.

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Take a big hex key and put the small side into the chuck and lock it in. Then hit the long side with a hammer to spin it counter-clockwise while looking the drill from the chuck--side. If that is indeed the bottom of a screw, that should loosen the chuck. Generally chucks are held on by a reverse-thread screw inside the chuck.

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Thank you all for your help.

 

So, there is no actual reverse thread screw inside the chuck?

 

Like you said, and going by the last photo, chuck can be undone by just turning it anticlockwise with enough force.

 

I wonder where there is no screw holding the chuck anymore.

 

Can you  confirm please, since  you have the chuck off, is the wobble issue because chuck is shit, or the axle is eccentric as well?

 

 

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That's a terrible design without a lock screw, especially on a drill this powerful...you could do it on the NiCad stuff but not this, even a compact drill.

 

 

Dewalt has good chucks, hopefully reseating it will help but unlikely. Make sure it's nice and tight when you put it back on then if it is you might want to consider locktite if it comes off in use.

 

I had to learn that trick because I'm going to have to change the chuck on my big Milwaukee Fuel, that chuck sucks.

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Your guess is as good as mine, I was confused but pleasantly surprised when I found out. It's bonded or sealed somehow for sure, it took a hell of a beating before it spun out on me. Best of luck to you in any case! For my own curiosity, what chuck do you have in mind? The rohm they come with is pretty high quality, but given that the 796 has the extra gear travel for hammering, it's going to have that slight wiggle tolerance inherintly. That's why I picked up the 791 compact- no hammer, and much tighter spin for precision work.

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The outside aesthetics of chucks really aren't very similar to the other brands. If that knurling looks like Moore,C's then it's a Rohm.

 

I was under the impression that all-metal Dewalt chucks were Rohm and the plastic ones were Jacobs.

 

I think you'd be doing yourself a disservice if you don't remove that chuck to make sure, we could be wrong but so can you...that being said, Rohm makes a good chuck, it could fix the problem even if they are the same make/model.

 

 

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I got a different chuck
 
As per photo.
Drill is purchased in New Zealand though.
 
 
IMG_2683.thumb.JPG.6f379c31726660435f12f4c2c842cb38.JPG
Mines got some miles on it lol maybe I can't see the whole thing, but that sleeve looks exactly like my baby's did, back before some apprentices and tight spots got to her lol. I agree though, pull it to be sure. DeWalt metal- Rohm, plastic-jacobs has been my understanding for a long time as well. Can't imagine they change components like that geographically without some crazy back story.
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  • 3 weeks later...

If the chuck is good quality (which I agree, the Rohm chucks are), the wobble is more likely coming from the spindle right? Does the wobble actually affect your work? If not, forget about it and enjoy the drill.

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