Hub Type Shaper Cutter is recommended for cutting long-width or coarse pitches. Used for roughing and finishing external gears. In general terms, any tooth form, face width, or the number of teeth that are available on a shank cutter can be manufactured with a hub-type fitting. Hub Type Shaper Cutters from STC can be made in any material grade and size range.
Please read the originial post here: https://stcgeartools.com/hub-type-shaper-cutter.php