yep
they are all pretty similar

most drills have a slip clutch built into the gearbox, and youll find that theres a bunch of holes in the end of the gearbox , some ball bearing held in place with springs, and stuff... dump all that and tap a 5mm bolt into a couple of the holes until it just touches the metal gear ring inside... this stops the gearbox cage from just spinning...
Im sure someone has a natty diagram of this explaining better that I just did.