This video explains and demonstrates two-hob deburring of a plastic gear on a Hera 30 hobbing machine.
Two-hob Gear Deburring
Gears really do not like burrs, so after gear cutting, burrs must be removed.
Here is one example of the many ways to deburr a gear.
This process uses 2 hob cutting tools.
Each cuts and feeds in an opposite direction, thus removing burrs.
This process can be used on plastic or metal gears.