DewaltFan Posted September 27, 2021 Report Share Posted September 27, 2021 I have a cordless Dewalt hammer drill, DCD796. A great drill, been using it for maybe 4-5 years. Today I was hammer drilling little 3/16” in brick for Tapcon screws. When I finished and went to remove the drill bit, the knurled barrel on the Jacob’s chuck just spun, without resistance and without loosening the jaws. It seems to me that something sheared inside the chuck, or perhaps a pawl or similar is stuck disengaged. (I don’t know what a chuck has internally.) Lots of Internet searching describes how to remove a chuck by loosening the internal bolt and chucking up an Allen wrench to whack with a hammer, but it that doesn’t apply here. I am unable to loosen the jaws to remove the drill bit. Also note that it is not, “stuck.” Two channel locks or hammer tapping is not going to help here. I’ve turned the chuck barrel by hand and under motor power every which way, but the knurled barrel just spins and spins without doing anything. I’ve only found one or two hits that match this problem, and neither had a solution. So…any ideas on getting this off? We have a full machine shop at our local makerspace, so I can totally wreck this thing if I can’t find a legit fix. Maybe machine off to each jaw in the vertical mill, or attempt to cut off the front of the hardened chuck in the band saw. Scratching with a knife, or he jaws appear to be less hard than the housing, which surprised me. I could be wrong about that. Any suggestions or crazy ideas? Quote Link to comment Share on other sites More sharing options...
Altan Posted September 27, 2021 Report Share Posted September 27, 2021 Masonry drill bits have a tip that has larger diameter than the drill bit shank, so in this case 3/16" would have a body diameter like 5/32". I would cut the drill bit from a closer point to the chuck with a hacksaw (the body of it is probably made of HCS, so it is not hard to cut with BiM hacksaw blade) then drill the remaining part with 1/8" or 9/64" HSS or HSS Co Metal drill bit, so you will have a very little amount of the shank inside the chuck and probably you will be able to remove it with pliers (long nose or locking). I hope my English was good enough to explain this properly Quote Link to comment Share on other sites More sharing options...
DewaltFan Posted September 28, 2021 Author Report Share Posted September 28, 2021 Great idea… thanks! Quote Link to comment Share on other sites More sharing options...
Altan Posted September 28, 2021 Report Share Posted September 28, 2021 You are Welcome! I hope this works for you. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.