ZSW grizzly feeder are usually installed before the primary jaw crushers for feeding and sizing the raw material. GF Grizzly FeederCharacteristics of GF Grizzly Feeder 1. The whole machine is of high rigidity, which can bear the impact of large rocks; 2. The screen surface of grizzly bar is of double or triple steps in the shape of Ladder; 3. The space of the grizzly bars can be adjustable to ...