Some Lunchtime Virtual Doodling

While snacking at lunch time I started playing with a new program I downloaded from WoodGears.ca called Gear Template Generator. It took a couple of minutes to figure out the interface, but within moments I'd come up with this:

Using the Export to DXF function I was able to pull the ring gear into Rhino3D, tweak the outside dimensions, and add a couple of teeth, then extrude it into a solid. To have this waterjetted from 1/8th-inch steel would leave an antweight weapon blade weighing 2.75 ounces, which sounds very fair!

Now to design the rest of the 'bot ...