The process of turning large particle materials into small particle materials by external force is called crushing, and the machinery used is called a crusher. The process of turning small particle materials into powder materials by external force is called grinding or milling, and the machinery used is called grinding machinery.
Difference between Crushing and Grinding. When making comparisons of the efficiencies of different grinding and crushing machines it is desirable to be able to estimate the work actually done in crushing the ore from a given size of feed to a given size of product, the screen analysis of both feed and product being determined. Messrs.