These feeders are used to feed the primary machines. They are appropriate to treat also large size materials and they  rough out the drier feeding material  in low humidity sites.

The GRIZZLY feeder is composed  by  a rectangular body in which about half of the base is enclosed by anti-wear metal sheets, while the remaining part is fitted with selection bars forming a material grading grid that removes the soil and the fine parts that otherwise would overload the crushing machine.