Use a router bit correctly by first installing it on a router and then working on the subject and project for which it is intended to get the best results. Using a router necessitates great precision and patience when properly aligning the device and feeding it through the material slowly so that the rotating router bit has full power.
If you're forcing the router through the material, keep in mind that you'll most likely snap the bit off due to excessive pressure, and that you'll probably char the material and give it an uneven edge that will need to be sanded or smoothed. Instead, use shallow, slow passes to get the finest cut possible while working your way deeper