Eviscerator-bot: 2001 - SolidWorks
This was one of my first forays into battle-bot design. I thought making an impenetrable shell made from a forged manhole cover would be a good start, and the weapon was a pair of chain-saw blades mounted on pincers, which would pull in towards a pair of contra-rotating abrasive cut-off wheels. The Whole head is articulated to move up and down and also pivot so it could grab from above. The neck area is protected by scales made from shovels.