Chuck loosens chuck will not stay tight in reverse

I would start out blowing out the chuck with high pressure air because you might have some saw dust or other item causing friction that is allowing the chuck to move. Then I would spray a lot of WD-40 down the chuck to float any contaiminents up.

Inside the chuck, if it is wide open, you should see a screw with a T20 head It is reverse thread so turn to the right to loosen. If it is too tight, clamp gently with the chuck facing up and let some WD-40 soak in for a while.

you would hold chuck in a firm grasp as your hand around a pipe and hold tight,run drill in reverse and that should loosen the chuck and the bit. If its to tight for your hand get a pair of channel locks and hold chuck.

The chuck will not turn. So to loosen just turn the black plastic counter clockwise. The chuck will loosen. Or you can hold the black part on the chuck tight and put the drill in reverse and slowly squeeze the trigger and the chuck will loosen also. Do the opposite to put a new bit in. Put the drill in forward and hold the black part of the chuck and squeeze the trigger with the bit in place and it will tighten down on the bit.

the chuck on my dewalt 18 volts hammer drill will not stay tight it loosenss whether i am in forward or reverse

I have the same drill and love it !! This series of Craftsman Drills are the first of the keyless chuck. To tighten or loosen the bit, simply pull back on the black ring tightly and hold it and simultaneously pull trigger to run drill foreward (to tighten bit). Reverse (to loosen bit). The chuck will make a loud clicking sound!! This is normal !

If the chuck is too tight to get the bit out you can either put a glove on one hand grab the chuck and run the drill in the reverse direction or if that will not work use vise grips or a small pipe wrench on the chuck to loosen it but be sure to tape the pipe wrench or vise grips with a thin piece of duct tape so you don't gouge the drill chuck.

What you need to do is get a piece of strong strapping, on a stick like a jar opener, or a vice, or some way of "Grabbing" the chuck, other than you hand, even using the inner edge of a door frame and "Grip" the Chuck, Now with a nice fresh battery installed, put it in "Reverse" and holding the chuck tight operate the unit and it should undo itself.

Hi,

the Chuck should be 2 Part.

Use 2 pair of stillsons Or pipe wrenches, Tight On the 2 Chuck Parts, Crack in opposite Directions.

Alternative, Use Wrench On Chuck Jaw, Short sharp Blow With Hammer.

Mike @ compurepair.