I have tried 3 times now to print the small gear for my Prusa and failed.
Other prints come out great, the only very minor issues here and there (other than I keep breaking of slipping filament)

The gears will come out nice on one side, and the other will have odd shapes to the teeth.
I have tried it with and without the cooling fan. Last time the side the fan is on turned out nice, but that might have been by chance.

Last print was these settings.
ABS
230C
90C
Layers= 0.18
Walls= 0.8
Fill= 100
Print Speed= 65