Q&A for How to Change a Drill Chuck

There is no good way to tighten the chuck without a key. You need to go to a hardware store and buy a key.

Take apart the drill, take out the spindle and chuck, then use a slide hammer to pull off the chuck. Please note that this solution will damage the chuck or spindle and will only work for tapered spindles.

If it's jammed open, soak it in oil overnight and put it in a vise. Using a small blowtorch, blast it for a few seconds at a time (being careful of the plastic). Next, jam an Alan key in with wedges till tight, then hit it with a hammer. It should release itself.

You will need tapers, jaws, a spindle, a threaded ring to close the jaws, and a thread for it to ride on.

Soak it in an oil overnight. I really like Kroil; it’s amazing stuff.

The screwdriver must be Phillips type, it can also be flat type. In both cases, make sure the driver size is the right one or you may end up damaging the screw, making it more difficult in every slip to turn it (in the worst case scenario, you may have to destroy the screw to remove it because of the damage). In any case, not much of a difficulty for removing any screw style, just the right screwdriver needed.