My AEG 630 watt drill SBE630RX. The keyless chuck is seized and will not release drill bit. This is used on a regular basis if this is any help. Many thanks. Trev

Watch this video.. here is link Drill Driver 101 How to Use Keyless Chuck

Keyless chucks work one of two ways
1: Simply turn the chuck by hand to loosen or tighten drill bit, once it grips the drill bit you will not be able to turn it anymore
2: Some keyless chucks operate by pulling the chuck back towards the body of the drill, placing the drill bit in and then releasing the chuck back to its original position

Try holding the bit in a vice and gently tap the chuck off of the bit and see it it releases the pressure on the jaws.

By stuck do you mean that you can not release the chuck? if so then you can use 2 channel lock pliers to grip the chuck and the base to break it free. i have done the same on a keyed chuck and a keyless chuck .

I just put mine in reverse and grasp the chuck with a pair of channel locks. Pull the trigger and hold the channel locks tightly. The chuck will release the bit.

keyless chuck. grab the ring immediately behind the chuck and the tampered chuck piece with a padded channel lock plier. turn the chuck part clockwise to release.

jacobs come out with this all metal keyless chuck(i think thats what you have) and if thats the case, there is no solution for this youll have to replace the hole chuck, being its new, it may be under warrenty

It's best not to use the drill power and your hand to try and release. Or tighten for that matter.

Set the drill down, and try using both hands on the clutch.

If that don't work, try using vise-grips or channel locks.

If that don't work, whip out of the WD-40 and let soak and then try again.

hi
open the chuck all the way and then look down in the centre of the chuck you should see a cross head screw
unscrew and the chuck should pull out as this is on a taper system ( note the screw is left hand thread )