Milling is a metal cutting process in which different shapes and sizes of the surface are generated by cutting action of rotating multi-point cutter fixed on a periphery of a wheel and feed is given to the work. The shaft on which milling cutter is mounted is known as arbour, this may be horizontal or vertical. On the basis of the position of the arbour a milling machine can be divided into two classes: horizontal and vertical milling machines as shown in Figure 19.41. Size of the milling machine is generally denoted by the dimension of the table. Different manufacturers denote these sizes by different numbers such as 0, 1, 2, 3, 4, 5, 6, etc. Each of these numbers indicates a particular standard size adopted by the manufacturer.
Figure 19.41 Horizontal and Vertical Milling Machines
The various types of milling machines are column and knee type, fixed bed type, planer type, production milling machine, and special purpose milling machine.
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