· Hammer mills are a type of impact mills that utilize fixed or swinging hardened steel hammers, chain or a cage. Hammer mills can be used for coarse crushing or fine grinding, depending on the size and configuration. Hammer mills are available in vertical and horizontal rotor configurations with one to many rows of hammers.
Plain Milling Operation: It is the operation of producing a plain, flat, horizontal surface, parallel to the axis of rotation. This operation is also known as slab milling. This operation is very common and done in almost all jobs. This can be carried out on every mill machine. Plain milling operation diagram.