CHAPTER XLV 



FEED MILLS AND CORN SHELLERS 



Feed Mills. The work of the feed mill is the reduction 

 of grain to meal. In some machines it is necessary that this 

 process be accomplished by two stages, especially if ear corn 

 is to be ground. The corn first passes between a set of crush- 

 ing rollers and then through the main grinding mechanism of 

 grinding plates or buhrstones. Feed mills differ most in the 

 construction of the grinding plates or buhrstones. 



Grinding Plates. Buhrstones are used where a very fine 

 meal, such as is required for table purposes, is desired. Most 

 feed mills used for grinding feed for live stock have chilled- 

 iron grinding plates. These are hard, they wear well, and 

 can be easily replaced at a small expense when worn out. 

 These grinding plates are made in a variety of shapes, al- 

 though the flat or disk shape is the more common. They 



are sometimes made cone shaped. 

 Roller mills are used to some 

 extent for grinding feed for live 

 stock. These rollers are generally 

 made smooth and depend upon 

 the crushing of the grain to reduce 

 it. The roller may have a milled 

 surface and revolve against the fixed 

 part or grinding plate. 



The Power Mill. Power mills 

 are usually arranged to be driven 

 by a belt or a tumbling rod. A 

 balance wheel is considered a de- 



belt-driven feed 



mill. 



298 



