gandalfnz Posted October 4, 2017 Report Share Posted October 4, 2017 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! Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 4, 2017 Report Share Posted October 4, 2017 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! 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]Sent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 4, 2017 Report Share Posted October 4, 2017 Left is 796 I spun the chuck off of (twice after on accident of forgetfulness lol) and right is the never been tampered with 791. I know it looks like a bolt, but it's just the divit at the end of the threaded armature coming from the gear house. Sent from my SM-G950U using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 4, 2017 Author Report Share Posted October 4, 2017 Thanks for the reply? Not sure if I understand this fully. So heat it up, and then just pull on it, until it comes out? There is not thread on it? Thanks Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 4, 2017 Report Share Posted October 4, 2017 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. Sent from my SM-G950U using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
BMack37 Posted October 5, 2017 Report Share Posted October 5, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 Right fine idea, there haha here she is bud. This is what you're looking at busting looseSent from my SM-G950U using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 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? Quote Link to comment Share on other sites More sharing options...
BMack37 Posted October 5, 2017 Report Share Posted October 5, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 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. Sent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 Was thinking of pick up this... costs almost as much as a brand new drill http://www.ebay.com.au/itm/Rohm-EXTRA-RV-13mm-Metal-Keyless-Chuck-1-2-x-20-Steel-Single-Sleeve/172367259146?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20151029142714%26meid%3De52424b3874a4fe591f09fcc800cb115%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D172367256125&_trksid=p2047675.c100005.m1851 What is the brand of the metal chuck currently on 796? Thanks 1 Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 Rohm, if I'm not mistaken. Well known, German made [emoji106]Sent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 I think that might be the very chuck you're trying to remove hahaSent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 4 minutes ago, Moore,C. said: Rohm, if I'm not mistaken. Well known, German made Sent from my SM-G950U using Tapatalk German made, and they wobble so much. There is definitely no writing on the chuck that would indicate what brand it is, at least on mine. Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 I initialy bought a 795, the chuck had wobble, I thought it was faulty. Took it back to the store, tried 5 others, and all were the same. Then decided to go for 796, same problem, but decided to keep it. Quote Link to comment Share on other sites More sharing options...
BMack37 Posted October 5, 2017 Report Share Posted October 5, 2017 10 minutes ago, Moore,C. said: I think that might be the very chuck you're trying to remove haha Sent from my SM-G950U using Tapatalk I was under that impression. He could consider the Makita chuck(Yukiwa Seiko) 1 Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 German made, and they wobble so much. There is definitely no writing on the chuck that would indicate what brand it is, at least on mine.That's your oem rhomSent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 You'd be paying the cost of the entire drill, for a second chuck you don't want lol sorry, brotherSent from my SM-G950U using Tapatalk Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 I see There is no writing like that on my chuck....weird. I am guessing its not rhom Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 I see There is no writing like that on my chuck....weird. A good half inch of the chuck bottom is underneath the drill housing when it's attached Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 I got a different chuck As per photo. Drill is purchased in New Zealand though. 1 Quote Link to comment Share on other sites More sharing options...
BMack37 Posted October 5, 2017 Report Share Posted October 5, 2017 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. 1 Quote Link to comment Share on other sites More sharing options...
Moore,C. Posted October 5, 2017 Report Share Posted October 5, 2017 I got a different chuck As per photo. Drill is purchased in New Zealand though. 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. 1 Quote Link to comment Share on other sites More sharing options...
gandalfnz Posted October 5, 2017 Author Report Share Posted October 5, 2017 Thanks for all the help. Might give it a go, kinda hesitant since its still has 3 years of warranty left. Quote Link to comment Share on other sites More sharing options...
dwain Posted October 25, 2017 Report Share Posted October 25, 2017 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. Quote Link to comment Share on other sites More sharing options...
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