An impact crusher also called a hammer crusher is quite versatile can be used as a primary secondary or tertiary crusher. . It is used for size reduction of minerals ores chemicals Ferro-alloys except low carbon Ferro-chrome Reduction ratio is 1 4 to 1 6 Body Sturdy M.S. Shaft EN-8 Jaws 10-12 Mn-steel. Chat Online Crushing plantWikipedia.