These feeders are used for feeding the material derived from the quarry to the primary crushers.
They have a very heavy duty bunker. The volume of these bunkers is between 10 m³ and 100 m³. Two heavy-duty vibromotors are used to apply to the feeder trough a linear motion. The feeder body stands on helicoid springs of enough quantity. By means of grizzly bars located in front of the feeder body, it is possible to remove soil going into the crusher. It is possible to adjust the grizzly spacing easily.
The bottom of the feeder trough is lined with abrasion resistant liners.