Vibrating Rock Feeder (Grizzly Feeder)

General Machinery vibrating rock feeder: 75-600 tph capacity, feed size up to 1500 mm, with a grizzly by-pass that pre-scalps fines and soil before the crusher. Vibromotor or eccentric drive, models GNR 60/90/110/140; delivers steady, choke-feed material to the primary crusher. A vibrating rock feeder (grizzly feeder) is a heavy-duty machine that feeds run-of-mine (ROM) rock to the primary jaw or impact crusher in a steady, controlled flow, while its grizzly by-pass section separates fines and soil before they reach the crusher. Built by General Machinery, it is driven by a vibromotor or an eccentric belt-and-pulley drive, handles feed sizes up to 1500 mm and works at 75-600 tph. How it works A loader, truck or excavator dumps ROM material into the hopper. The vibrating trough, mounted on heavy-duty helical springs, moves material forward with a linear/circular vibration. The grizzly section at the trough end performs two functions: Role in the plant The feeder is the plant's first link: regulated feeding plus pre-scalping/by-pass. The by-pass keeps fines and soil away from the primary crusher, reducing jaw/impact liner wear (a direct effect on cost per ton), raising capacity and cutting wasted crushing energy. Continuous, non-intermittent feeding gives a more stable crusher output. Applications and material Ideal for hard/abrasive quarry rock (granite, basalt), limestone and dry to medium-moisture ROM. With high-moisture or sticky (clayey) material there is a blinding/pegging risk on the grizzly; in that case a Wobbler feeder is preferred. Suited to fixed and mobile primary plant intakes, mining, aggregate and recycling sites. Complete plant solution General Machinery supplies the feeder together with the primary jaw/impact crusher, grizzly screen, belt conveyor and concrete batching plant from a single supplier. The feeder can be engineered as one integrated project with the full crushing-screening-washing line — one point of contact, one accountable party and a matched spare-parts chain (wear grizzly bars / body plates). S: What does a vibrating rock feeder do? C: It feeds run-of-mine rock to the primary crusher in a steady, controlled flow while pre-scalping fines and soil through a grizzly by-pass before they reach the crusher, raising crusher efficiency and reducing wear. S: Why is the grizzly by-pass important? C: The by-pass keeps fines and soil away from the crusher. That reduces jaw/impact liner wear (lowering cost per ton), increases capacity and efficiency, and avoids wasting crushing energy on material that is already fine. S: Should I choose vibromotor or eccentric drive? C: A vibromotor is ideal for small to medium capacities; an eccentric-weight belt-and-pulley drive is preferred for high capacity and large lumps. General Machinery offers both and recommends the right one for your application. S: What are the maximum feed size and capacity? C: The feeder accepts ROM material up to 1500 mm. Capacity ranges by model from 75 tph (GNR 60) to 600 tph (GNR 140). S: Can it handle sticky or wet material? C: It is ideal for dry to medium-moisture material. With high-moisture or clayey material the grizzly can blind (clog); in that case a Wobbler feeder is recommended. Send us your material type and we will configure the right feeder.