Is the chuck a replaceable part
SOURCE: HOW DO I LOOSEN A KEYLESS CHUCK TO REMOVE A DRILL
Keyless chucks normally have a knurled ring at the base of the chuck that you hold in one hand while turning the large knurled taper with the other. If the chuck has been overtightened, and you cant open like this, try using two stilson wrenches (Pipe wrenches) one on each of these parts. Use a soft cloth in the jaws to avoid damaging the knurling. You can also try some Q20 or similar into the chuck to help lubricate it.
SOURCE: Cordless Drill, Keyless Chuck stuck in full open position.
if chuck is wide open ,look down inside there should be an allen screw or bolt at the bottom of the chuck it should undo anti clocwise and the chuck comes off
SOURCE: Black and Decker Cordless Drill Chuck stuck in full open position
I'd put penetrating oil in it and tap the chuck with a plastic hammer. That should free it up.
Best rgrds, W/D
SOURCE: black decker drill keyless chuck won.t open !
hold the back of the chuck with channel locks or a vice and use the same channel locks on the front and open the chuck manually it should work and you can get to the screw to replace it or the hand chuck. this can be a little frustrating but hang in there and you'll be a pro shortly.
SOURCE: relace keyless chuck
It really depends on the model. Here is a general description of how to remove most regular keyed and keyless chucks from corded and cordless drills:
Some chucks have a Left Handed screw that secures them to the spindle so they do not come loose. You can look into the chuck with a flashlight and see if there is a chuck screw. (It may be a torx head, flat head, or philips head) You will need to remove this screw first before doing anything else. Sometimes there is loc-tite applied to the screw so it may be stubborn and sometimes you will strip the screw head. Remeber that the old saying lefty-loosey, righty-tighty does not apply here. Left is actually tightening a left hand thread, so you want to turn it right to loosen. I know, it will feel weird but thats the way to loosen it. You may have to apply some heat to the screw in order to get that loc-tite to break. A pencil torch works great. If you strip the head out you will have to use a drill press and drill the screw head off.
After removing the screw you can remove the chuck.
To remove the chuck, the easiest way is to use a hex socket bit and an impact wrench. Put the hex bit in the chuck, and depending on the condition of the jaws, tighten the jaws as much as possible to the hex bit. Put the impact in reverse and bump it until the chuck is loosened. If you do not have access to an impact wrench you will need to put a hex key with a long arm into the chuck and tighten it then place the drill on the edge of your bench and give it a good whack with a 3lb hammer. It may not come off immediately so you may have to reset and do this a couple of times. Not the most effective way to remove a chuck, especially if one of the jaws is missing, but that is what most manufacturers tell you to do. I myself cut the collar off with a die grinder and then use a pipe wrench on the body of the chuck applying constant pressure while heating the chuck body with a torch. Works every time. Heat is our friend on stubborn chucks. Good luck, any questions please post.
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