The Working Principle of Hammer Mills (Step-by-step Guide .A hammer mill is an essential machine in the pharmaceutical and food processing industries. You can use it . Even though there are many types of hammer mills, the working principle is still the same. . Every part/component you see in the image above plays an integral role in the overall working principle of hammer mills.working picture of industrial hammer mill,Hammer Mill: components, operating principles, types, uses, advaJan 11, 2016 . Hammer mill is the most widely used grinding mill and among the oldest. Hammer mills consist of a series of hammers (usually four or more) hinged on a central shaft and enclosed within a rigid metal case. It produces size reduction by impact. The materials to be milled are struck by these rectangular.