These heavy-duty, robust designs are employed in the most severe environments. The basic designs are configured with segmented cast screw segments and heavy duty thrust bearings that offer years of low-cost operation. We have customers with Terriers in continuous operation since the 1950’s! Bonnot Terrier Extruders are designed with large hopper openings for high volume production. They can be configured with a counter rotating packer in the hopper above the screw to enhance feeding of difficult materials.