Hi Brian, well the one in Petr's associated image that you were asking about is curved, not flat. I assume that he used this method to make that particular image.

A flat piece is certainly a common kind of gear structure, but as far as I could tell that command is not currently set up to create flat pieces, just curved gears.

It's probably not too difficult to draw a flat piece by hand though, you would do something like draw one tooth and then use Transform / Array / Dir to replicate it...

If you can make a diagram of what you want to create I should be able to show you the steps for it.

- Michael