There are various size reduction equipment and have different principle. The common working principles in food industries are slicing (as in preparing potato chips), dicing (cutting into cubes), shredding (shear force as in wheat milling), grinding (impact force as in making spice powder), crushing and pulping (as in fruit juice extraction). However, size reduction equipment are not only used in food processing industries. It is also widely used in construction industries. Common examples are; Jaw crusher and Gyratory crusher.