BE series is an enclosed housing slew drive with IP65 enclosure protection level, it is designed with a strait worm shaft with 1.8 teeth in contact between the slew ring and the worm shaft. This design has curved teeth on the slew ring and it is Oxi-Nitrocarburized. This is the lightest design in its class. Specially designed for accurate positioning as it has a very tight tolerance compared to hourglass designs. Back holding torque is slightly less than the hourglass design but it beats all other drives in accuracy and weight.