The NA/FA series provides maximum heat dissipation, universal mounting, and various coupling options. The gearbox is composed of lubrication properties, for long service life.
The unit is designed with die cast aluminium material on all sides. Its worms are made from a hardened, and peeled steel. Also, the device's worm gears are constructed from bronze material, which are made with a centrifugal process.
Models in the series are available in a wide range of versions.