you are meant to hold in a black button to lock the chuck but this no longer holds the chuck.

GBL, August 2008

thanks; I will give it a try. Looks like I may be buying a new drill (not b+d!)

GBL, August 2008

This Black and Decker Drill is made of plastic housing so it may not work, but you can give this a try....
-Take the Power tool apart
-take the gear box intact and leave the armature in
- put the gear housing in a vise
-take a pipe wrench or pliers (large) and hold onto the armature with one hand and with the pliers or pipe wrench hold onto the chuck and turn the wrench.
I should mention I have broken housings and ruined gears trying to get chucks off of this model.
Good luck!

Don- www.toolsandmachinery.com, August 2008