The primary impact crushers make the less abrasive materials of medium hardness smaller with a high ratio. The materials from the quarry are processed with the primary impact crushers firstly. They have the ability to crush the materials up to 1 meter x 1 meter size to a size of 25 mm. There are 2 pieces of manganese coated adjustable crushing chamber. All surfaces that come into contact with broken stone covered with manganese undercoats. Crushing process is done with the 4 palettes of high-alloy manganese in a rotor weighing 8500 kg and rotating with 450 revolutions per minute.