[114Klaatu0x72]

I don't have the exact gear specs, but I beleive the gears which broke were something attune to:
*80 and 16 tooth
*face width of a quarter inch
*14.5 or 20 degree presure angle
*pitch of either 16 or 20
*Made of cast iron, cheap cast iron.
There was maybe about 20 to 40 ft-lb of torque going through them, but its hard to say exactly because really nothing is left of that robot (cad, docs, notes, pictures) excpt for a stripped out frame and a single, half bald gear on our wall of shame. As for where we bought them, all I remember was that they came from some Chinese distributor and had BOSTON embosed in them. Unless you are constantly looking up cheap items and can read Mandarin, you probably won't come accross them.