Vibrating Feeders Telsmith feeders come in a variety of types and sizes. Built heavy to absorb the impact from dumping large stone, they still feed the plant a controlled, steady stream of stone. Typically applied in primary feed applications, Telsmith has unique designs for portable or fixed installations. Vibrating Grizzly Feeders are designed in two distinct duty classes; "severe duty" - designed for truck dump hoppers and large material, and "standard duty" - designed for loader-fed portable plants with low profile requirements.  Available in sizes from 36" x 12' up to 72" x 34’, many models are available with "stepped" grizzly bar sections to provide superior scalping of smaller stone. Vibrating Equipment Brochure