Originally Posted by hcompton
Buy a broken one off ebay with a good chuck and take it apart and swap the entire shaft. Looks just like a black and decker i have thats been working great for years. I bet that same drill is made under other brand names as well.
How many miles are on that thing. If its old them buy a new one if its not take it back to sears they return anything if it has not been too long. They also have there own tool repair place and can send it off to get fixed. At least they did a few years back. You might find they can order you a new chuck.
Im betting either way the drill will need to come apart to be fixed and the chuck is probably pressed on or pined in place. Once you get it apart the shaft probably has a small pin that can be driven out or drilled out. if its not screwed in place. A lot of equipment chucks are revered threaded onto the shaft and lock tight in place. so you put if in a vice and a pipe wrench to get it off. But who knows I would have to see if first hand to be sure.
DUMB A..ME it was a left hand thread!This "old"age trips,is not good, again thanks for all the help.This a great forum for this type thing bob scharp