A 120 impact primary crusher is a crushing machine used mainly in the mining and construction industries to break down large stones and mineral blocks into smaller pieces. Primary impact crushers are specifically designed for the initial crushing stage, ensuring high efficiency. Their working principle relies on rotating hammers mounted on a rotor that strike the incoming material at high speed, breaking it down. These machines are commonly used for crushing hard stones such as limestone, basalt, and granite, making them ideal for quarries, mining sites, and recycling plants.