After 11 years of faithful service the dremel died on me last night. Had to go to Lowe's and buy another one. I'm bummed out.
Loosen the chuck then push the cutter into the dremil before pulling out. You should able to buy a replacement chuck at any HW store. All of mine died at the switch, I have wired one to be on when I plug it in and turn it on and off with a foot switch, it works but it is dangerous if I forget how I have it wiredThe motor still works. The stop in the chuck doesn't work. It's got a carbide cutter stuck in it. I might work on it and see if I can fix it.