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?
