The mill comprises of a steel rotor, carrying four steel hammers hinged to it.This arrangement is housed in a cast iron chamber with a feed inlet and an outlet. A motor driven worm,independently feeds the material into the mill. On the outlet side, a mesh is fixed so that finer material of the desired size only can pass down. The coarser material is carried around and pounded further. The ground material is collected in a cloth sack provided for this purpose. The maximum fineness possible is 250 mesh. Additional screens of 72 mesh and 100 mesh are also applied along with the instrument. The mill has a hopper to feed the material. The feed size is 5 mm. (maximum) Wired for 440V., 3ph.50 Hz.