The vibratory screener model K72-1K-SS discharges oversize particles 360° around the periphery of an "External Kascade" circular screening deck. The unit is intended for screening of wet or dry bulk materials containing a large percentage of oversize fractions. As material is fed onto the center of the deck, on-size particles pass through the screen and funnel through a lower discharge chute. Oversize particles flow outward in a spiral pattern and cascade at any point over the periphery of the circular scree onto a spiral vibratory trough that directs the material into a high capacity discharge spout. Typical applications include removal of fines from plastic pellets, cereal, pet food, fertilizer, salt, sugar and dewatering large amounts of solids.